diff --git a/wp-includes/Requests/Auth.php b/wp-includes/Requests/Auth.php
index bca4109209..914c7449ca 100644
--- a/wp-includes/Requests/Auth.php
+++ b/wp-includes/Requests/Auth.php
@@ -29,5 +29,5 @@ interface Requests_Auth {
 	 * @see Requests_Hooks::register
 	 * @param Requests_Hooks $hooks Hook system
 	 */
-	public function register(Requests_Hooks &$hooks);
-}
\ No newline at end of file
+	public function register(Requests_Hooks $hooks);
+}
diff --git a/wp-includes/Requests/Auth/Basic.php b/wp-includes/Requests/Auth/Basic.php
index a355cfd5f5..68d15bd5db 100644
--- a/wp-includes/Requests/Auth/Basic.php
+++ b/wp-includes/Requests/Auth/Basic.php
@@ -53,9 +53,9 @@ class Requests_Auth_Basic implements Requests_Auth {
 	 * @see fsockopen_header
 	 * @param Requests_Hooks $hooks Hook system
 	 */
-	public function register(Requests_Hooks &$hooks) {
-		$hooks->register('curl.before_send', array(&$this, 'curl_before_send'));
-		$hooks->register('fsockopen.after_headers', array(&$this, 'fsockopen_header'));
+	public function register(Requests_Hooks $hooks) {
+		$hooks->register('curl.before_send', array($this, 'curl_before_send'));
+		$hooks->register('fsockopen.after_headers', array($this, 'fsockopen_header'));
 	}
 
 	/**
@@ -85,4 +85,4 @@ class Requests_Auth_Basic implements Requests_Auth {
 	public function getAuthString() {
 		return $this->user . ':' . $this->pass;
 	}
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Cookie.php b/wp-includes/Requests/Cookie.php
index 6fccec64f3..7dd5b6822d 100644
--- a/wp-includes/Requests/Cookie.php
+++ b/wp-includes/Requests/Cookie.php
@@ -65,16 +65,16 @@ class Requests_Cookie {
 	 * @param array|Requests_Utility_CaseInsensitiveDictionary $attributes Associative array of attribute data
 	 */
 	public function __construct($name, $value, $attributes = array(), $flags = array(), $reference_time = null) {
-		$this->name = $name;
-		$this->value = $value;
+		$this->name       = $name;
+		$this->value      = $value;
 		$this->attributes = $attributes;
-		$default_flags = array(
-			'creation' => time(),
+		$default_flags    = array(
+			'creation'    => time(),
 			'last-access' => time(),
-			'persistent' => false,
-			'host-only' => true,
+			'persistent'  => false,
+			'host-only'   => true,
 		);
-		$this->flags = array_merge($default_flags, $flags);
+		$this->flags      = array_merge($default_flags, $flags);
 
 		$this->reference_time = time();
 		if ($reference_time !== null) {
@@ -228,7 +228,7 @@ class Requests_Cookie {
 	public function normalize() {
 		foreach ($this->attributes as $key => $value) {
 			$orig_value = $value;
-			$value = $this->normalize_attribute($key, $value);
+			$value      = $this->normalize_attribute($key, $value);
 			if ($value === null) {
 				unset($this->attributes[$key]);
 				continue;
@@ -385,7 +385,7 @@ class Requests_Cookie {
 	 * @return Requests_Cookie Parsed cookie object
 	 */
 	public static function parse($string, $name = '', $reference_time = null) {
-		$parts = explode(';', $string);
+		$parts   = explode(';', $string);
 		$kvparts = array_shift($parts);
 
 		if (!empty($name)) {
@@ -397,13 +397,13 @@ class Requests_Cookie {
 			// (`=foo`)
 			//
 			// https://bugzilla.mozilla.org/show_bug.cgi?id=169091
-			$name = '';
+			$name  = '';
 			$value = $kvparts;
 		}
 		else {
 			list($name, $value) = explode('=', $kvparts, 2);
 		}
-		$name = trim($name);
+		$name  = trim($name);
 		$value = trim($value);
 
 		// Attribute key are handled case-insensitively
@@ -412,15 +412,15 @@ class Requests_Cookie {
 		if (!empty($parts)) {
 			foreach ($parts as $part) {
 				if (strpos($part, '=') === false) {
-					$part_key = $part;
+					$part_key   = $part;
 					$part_value = true;
 				}
 				else {
 					list($part_key, $part_value) = explode('=', $part, 2);
-					$part_value = trim($part_value);
+					$part_value                  = trim($part_value);
 				}
 
-				$part_key = trim($part_key);
+				$part_key              = trim($part_key);
 				$attributes[$part_key] = $part_value;
 			}
 		}
@@ -449,7 +449,7 @@ class Requests_Cookie {
 			// Default domain/path attributes
 			if (empty($parsed->attributes['domain']) && !empty($origin)) {
 				$parsed->attributes['domain'] = $origin->host;
-				$parsed->flags['host-only'] = true;
+				$parsed->flags['host-only']   = true;
 			}
 			else {
 				$parsed->flags['host-only'] = false;
@@ -497,7 +497,7 @@ class Requests_Cookie {
 	 *
 	 * @codeCoverageIgnore
 	 * @deprecated Use {@see Requests_Cookie::parse_from_headers}
-	 * @return string
+	 * @return array
 	 */
 	public static function parseFromHeaders(Requests_Response_Headers $headers) {
 		return self::parse_from_headers($headers);
diff --git a/wp-includes/Requests/Cookie/Jar.php b/wp-includes/Requests/Cookie/Jar.php
index 69be0fb57f..a816f90a0a 100644
--- a/wp-includes/Requests/Cookie/Jar.php
+++ b/wp-includes/Requests/Cookie/Jar.php
@@ -68,7 +68,7 @@ class Requests_Cookie_Jar implements ArrayAccess, IteratorAggregate {
 	 * Get the value for the item
 	 *
 	 * @param string $key Item key
-	 * @return string Item value
+	 * @return string|null Item value (null if offsetExists is false)
 	 */
 	public function offsetGet($key) {
 		if (!isset($this->cookies[$key])) {
@@ -162,14 +162,14 @@ class Requests_Cookie_Jar implements ArrayAccess, IteratorAggregate {
 	 *
 	 * @var Requests_Response $response
 	 */
-	public function before_redirect_check(Requests_Response &$return) {
+	public function before_redirect_check(Requests_Response $return) {
 		$url = $return->url;
 		if (!$url instanceof Requests_IRI) {
 			$url = new Requests_IRI($url);
 		}
 
-		$cookies = Requests_Cookie::parse_from_headers($return->headers, $url);
-		$this->cookies = array_merge($this->cookies, $cookies);
+		$cookies         = Requests_Cookie::parse_from_headers($return->headers, $url);
+		$this->cookies   = array_merge($this->cookies, $cookies);
 		$return->cookies = $this;
 	}
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception.php b/wp-includes/Requests/Exception.php
index 37d4711c14..1080efd971 100644
--- a/wp-includes/Requests/Exception.php
+++ b/wp-includes/Requests/Exception.php
@@ -59,4 +59,4 @@ class Requests_Exception extends Exception {
 	public function getData() {
 		return $this->data;
 	}
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP.php b/wp-includes/Requests/Exception/HTTP.php
index 9ac6a873de..42ac59095a 100644
--- a/wp-includes/Requests/Exception/HTTP.php
+++ b/wp-includes/Requests/Exception/HTTP.php
@@ -68,4 +68,4 @@ class Requests_Exception_HTTP extends Requests_Exception {
 
 		return 'Requests_Exception_HTTP_Unknown';
 	}
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/304.php b/wp-includes/Requests/Exception/HTTP/304.php
index 6799033583..2636ba4517 100644
--- a/wp-includes/Requests/Exception/HTTP/304.php
+++ b/wp-includes/Requests/Exception/HTTP/304.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_304 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Not Modified';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/400.php b/wp-includes/Requests/Exception/HTTP/400.php
index b3ad774357..5bd5428c0f 100644
--- a/wp-includes/Requests/Exception/HTTP/400.php
+++ b/wp-includes/Requests/Exception/HTTP/400.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_400 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Bad Request';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/401.php b/wp-includes/Requests/Exception/HTTP/401.php
index 2e1e3d0b2a..62a283ab09 100644
--- a/wp-includes/Requests/Exception/HTTP/401.php
+++ b/wp-includes/Requests/Exception/HTTP/401.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_401 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Unauthorized';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/402.php b/wp-includes/Requests/Exception/HTTP/402.php
index 1d965d2329..f287fd4b22 100644
--- a/wp-includes/Requests/Exception/HTTP/402.php
+++ b/wp-includes/Requests/Exception/HTTP/402.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_402 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Payment Required';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/403.php b/wp-includes/Requests/Exception/HTTP/403.php
index 5ca3cafc1b..2ae1c44459 100644
--- a/wp-includes/Requests/Exception/HTTP/403.php
+++ b/wp-includes/Requests/Exception/HTTP/403.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_403 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Forbidden';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/404.php b/wp-includes/Requests/Exception/HTTP/404.php
index f08be2d270..e6e28672c3 100644
--- a/wp-includes/Requests/Exception/HTTP/404.php
+++ b/wp-includes/Requests/Exception/HTTP/404.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_404 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Not Found';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/405.php b/wp-includes/Requests/Exception/HTTP/405.php
index b8419e1eef..0461e6108c 100644
--- a/wp-includes/Requests/Exception/HTTP/405.php
+++ b/wp-includes/Requests/Exception/HTTP/405.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_405 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Method Not Allowed';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/406.php b/wp-includes/Requests/Exception/HTTP/406.php
index 09d0622b17..980ef0efc5 100644
--- a/wp-includes/Requests/Exception/HTTP/406.php
+++ b/wp-includes/Requests/Exception/HTTP/406.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_406 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Not Acceptable';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/407.php b/wp-includes/Requests/Exception/HTTP/407.php
index c21d1ec648..d08c6af7cc 100644
--- a/wp-includes/Requests/Exception/HTTP/407.php
+++ b/wp-includes/Requests/Exception/HTTP/407.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_407 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Proxy Authentication Required';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/408.php b/wp-includes/Requests/Exception/HTTP/408.php
index 0691863a9c..db15bc2910 100644
--- a/wp-includes/Requests/Exception/HTTP/408.php
+++ b/wp-includes/Requests/Exception/HTTP/408.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_408 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Request Timeout';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/409.php b/wp-includes/Requests/Exception/HTTP/409.php
index 5a3e0d1f1b..83002f9361 100644
--- a/wp-includes/Requests/Exception/HTTP/409.php
+++ b/wp-includes/Requests/Exception/HTTP/409.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_409 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Conflict';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/410.php b/wp-includes/Requests/Exception/HTTP/410.php
index 8eb3dafa65..5bf7aa6d46 100644
--- a/wp-includes/Requests/Exception/HTTP/410.php
+++ b/wp-includes/Requests/Exception/HTTP/410.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_410 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Gone';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/411.php b/wp-includes/Requests/Exception/HTTP/411.php
index cee6496ac5..25517b4f36 100644
--- a/wp-includes/Requests/Exception/HTTP/411.php
+++ b/wp-includes/Requests/Exception/HTTP/411.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_411 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Length Required';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/412.php b/wp-includes/Requests/Exception/HTTP/412.php
index e377d7975a..e89533a7ef 100644
--- a/wp-includes/Requests/Exception/HTTP/412.php
+++ b/wp-includes/Requests/Exception/HTTP/412.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_412 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Precondition Failed';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/413.php b/wp-includes/Requests/Exception/HTTP/413.php
index 3b5fe276ac..a7b38fce11 100644
--- a/wp-includes/Requests/Exception/HTTP/413.php
+++ b/wp-includes/Requests/Exception/HTTP/413.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_413 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Request Entity Too Large';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/414.php b/wp-includes/Requests/Exception/HTTP/414.php
index 14d5a59d37..54c8b8c9ae 100644
--- a/wp-includes/Requests/Exception/HTTP/414.php
+++ b/wp-includes/Requests/Exception/HTTP/414.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_414 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Request-URI Too Large';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/415.php b/wp-includes/Requests/Exception/HTTP/415.php
index 32446c854d..6b5f0785b8 100644
--- a/wp-includes/Requests/Exception/HTTP/415.php
+++ b/wp-includes/Requests/Exception/HTTP/415.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_415 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Unsupported Media Type';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/416.php b/wp-includes/Requests/Exception/HTTP/416.php
index 8c5f833db2..48a4ecdb8f 100644
--- a/wp-includes/Requests/Exception/HTTP/416.php
+++ b/wp-includes/Requests/Exception/HTTP/416.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_416 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Requested Range Not Satisfiable';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/417.php b/wp-includes/Requests/Exception/HTTP/417.php
index 8807c7171e..81570330aa 100644
--- a/wp-includes/Requests/Exception/HTTP/417.php
+++ b/wp-includes/Requests/Exception/HTTP/417.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_417 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Expectation Failed';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/418.php b/wp-includes/Requests/Exception/HTTP/418.php
index d6af806c44..0fcc87d614 100644
--- a/wp-includes/Requests/Exception/HTTP/418.php
+++ b/wp-includes/Requests/Exception/HTTP/418.php
@@ -26,4 +26,4 @@ class Requests_Exception_HTTP_418 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = "I'm A Teapot";
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/428.php b/wp-includes/Requests/Exception/HTTP/428.php
index 469e954546..799ddffd54 100644
--- a/wp-includes/Requests/Exception/HTTP/428.php
+++ b/wp-includes/Requests/Exception/HTTP/428.php
@@ -26,4 +26,4 @@ class Requests_Exception_HTTP_428 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Precondition Required';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/429.php b/wp-includes/Requests/Exception/HTTP/429.php
index 2a21fb345b..78a3148adf 100644
--- a/wp-includes/Requests/Exception/HTTP/429.php
+++ b/wp-includes/Requests/Exception/HTTP/429.php
@@ -26,4 +26,4 @@ class Requests_Exception_HTTP_429 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Too Many Requests';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/431.php b/wp-includes/Requests/Exception/HTTP/431.php
index ba1294e650..a92b48a4e7 100644
--- a/wp-includes/Requests/Exception/HTTP/431.php
+++ b/wp-includes/Requests/Exception/HTTP/431.php
@@ -26,4 +26,4 @@ class Requests_Exception_HTTP_431 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Request Header Fields Too Large';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/500.php b/wp-includes/Requests/Exception/HTTP/500.php
index 5165e353b8..22a6406ab2 100644
--- a/wp-includes/Requests/Exception/HTTP/500.php
+++ b/wp-includes/Requests/Exception/HTTP/500.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_500 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Internal Server Error';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/501.php b/wp-includes/Requests/Exception/HTTP/501.php
index 3dd6946236..11f395b20a 100644
--- a/wp-includes/Requests/Exception/HTTP/501.php
+++ b/wp-includes/Requests/Exception/HTTP/501.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_501 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Not Implemented';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/502.php b/wp-includes/Requests/Exception/HTTP/502.php
index 50c72d4713..43f576a625 100644
--- a/wp-includes/Requests/Exception/HTTP/502.php
+++ b/wp-includes/Requests/Exception/HTTP/502.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_502 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Bad Gateway';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/503.php b/wp-includes/Requests/Exception/HTTP/503.php
index 9304ecc6b5..4024a4f5cd 100644
--- a/wp-includes/Requests/Exception/HTTP/503.php
+++ b/wp-includes/Requests/Exception/HTTP/503.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_503 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Service Unavailable';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/504.php b/wp-includes/Requests/Exception/HTTP/504.php
index f46696bc1a..25fd08631c 100644
--- a/wp-includes/Requests/Exception/HTTP/504.php
+++ b/wp-includes/Requests/Exception/HTTP/504.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_504 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Gateway Timeout';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/505.php b/wp-includes/Requests/Exception/HTTP/505.php
index 1f80294e27..1f7cfec9b5 100644
--- a/wp-includes/Requests/Exception/HTTP/505.php
+++ b/wp-includes/Requests/Exception/HTTP/505.php
@@ -24,4 +24,4 @@ class Requests_Exception_HTTP_505 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'HTTP Version Not Supported';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/511.php b/wp-includes/Requests/Exception/HTTP/511.php
index 920d334b1f..3332513b15 100644
--- a/wp-includes/Requests/Exception/HTTP/511.php
+++ b/wp-includes/Requests/Exception/HTTP/511.php
@@ -26,4 +26,4 @@ class Requests_Exception_HTTP_511 extends Requests_Exception_HTTP {
 	 * @var string
 	 */
 	protected $reason = 'Network Authentication Required';
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/HTTP/Unknown.php b/wp-includes/Requests/Exception/HTTP/Unknown.php
index c70f58988a..b7eeb79538 100644
--- a/wp-includes/Requests/Exception/HTTP/Unknown.php
+++ b/wp-includes/Requests/Exception/HTTP/Unknown.php
@@ -41,4 +41,4 @@ class Requests_Exception_HTTP_Unknown extends Requests_Exception_HTTP {
 
 		parent::__construct($reason, $data);
 	}
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Exception/Transport/cURL.php b/wp-includes/Requests/Exception/Transport/cURL.php
index 67d157bee1..fffa8c259b 100644
--- a/wp-includes/Requests/Exception/Transport/cURL.php
+++ b/wp-includes/Requests/Exception/Transport/cURL.php
@@ -2,7 +2,7 @@
 
 class Requests_Exception_Transport_cURL extends Requests_Exception_Transport {
 
-	const EASY = 'cURLEasy';
+	const EASY  = 'cURLEasy';
 	const MULTI = 'cURLMulti';
 	const SHARE = 'cURLShare';
 
diff --git a/wp-includes/Requests/Hooker.php b/wp-includes/Requests/Hooker.php
index f667ae9c58..c852931f1a 100644
--- a/wp-includes/Requests/Hooker.php
+++ b/wp-includes/Requests/Hooker.php
@@ -30,4 +30,4 @@ interface Requests_Hooker {
 	 * @return boolean Successfulness
 	 */
 	public function dispatch($hook, $parameters = array());
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Hooks.php b/wp-includes/Requests/Hooks.php
index 2e61c73406..f857902ced 100644
--- a/wp-includes/Requests/Hooks.php
+++ b/wp-includes/Requests/Hooks.php
@@ -65,4 +65,4 @@ class Requests_Hooks implements Requests_Hooker {
 
 		return true;
 	}
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/IDNAEncoder.php b/wp-includes/Requests/IDNAEncoder.php
index ebbe2111b3..881142935b 100644
--- a/wp-includes/Requests/IDNAEncoder.php
+++ b/wp-includes/Requests/IDNAEncoder.php
@@ -141,31 +141,32 @@ class Requests_IDNAEncoder {
 		// Get number of bytes
 		$strlen = strlen($input);
 
+		// phpcs:ignore Generic.CodeAnalysis.JumbledIncrementer -- This is a deliberate choice.
 		for ($position = 0; $position < $strlen; $position++) {
 			$value = ord($input[$position]);
 
 			// One byte sequence:
 			if ((~$value & 0x80) === 0x80) {
 				$character = $value;
-				$length = 1;
+				$length    = 1;
 				$remaining = 0;
 			}
 			// Two byte sequence:
 			elseif (($value & 0xE0) === 0xC0) {
 				$character = ($value & 0x1F) << 6;
-				$length = 2;
+				$length    = 2;
 				$remaining = 1;
 			}
 			// Three byte sequence:
 			elseif (($value & 0xF0) === 0xE0) {
 				$character = ($value & 0x0F) << 12;
-				$length = 3;
+				$length    = 3;
 				$remaining = 2;
 			}
 			// Four byte sequence:
 			elseif (($value & 0xF8) === 0xF0) {
 				$character = ($value & 0x07) << 18;
-				$length = 4;
+				$length    = 4;
 				$remaining = 3;
 			}
 			// Invalid byte:
@@ -185,14 +186,14 @@ class Requests_IDNAEncoder {
 						throw new Requests_Exception('Invalid Unicode codepoint', 'idna.invalidcodepoint', $character);
 					}
 
-					$character |= ($value & 0x3F) << (--$remaining * 6);
+					--$remaining;
+					$character |= ($value & 0x3F) << ($remaining * 6);
 				}
 				$position--;
 			}
 
-			if (
-				// Non-shortest form sequences are invalid
-				   $length > 1 && $character <= 0x7F
+			if (// Non-shortest form sequences are invalid
+				$length > 1 && $character <= 0x7F
 				|| $length > 2 && $character <= 0x7FF
 				|| $length > 3 && $character <= 0xFFFF
 				// Outside of range of ucschar codepoints
@@ -201,7 +202,7 @@ class Requests_IDNAEncoder {
 				|| $character >= 0xFDD0 && $character <= 0xFDEF
 				|| (
 					// Everything else not in ucschar
-					   $character > 0xD7FF && $character < 0xF900
+					$character > 0xD7FF && $character < 0xF900
 					|| $character < 0x20
 					|| $character > 0x7E && $character < 0xA0
 					|| $character > 0xEFFFD
@@ -227,17 +228,18 @@ class Requests_IDNAEncoder {
 	 */
 	public static function punycode_encode($input) {
 		$output = '';
-#		let n = initial_n
+		// let n = initial_n
 		$n = self::BOOTSTRAP_INITIAL_N;
-#		let delta = 0
+		// let delta = 0
 		$delta = 0;
-#		let bias = initial_bias
+		// let bias = initial_bias
 		$bias = self::BOOTSTRAP_INITIAL_BIAS;
-#		let h = b = the number of basic code points in the input
-		$h = $b = 0; // see loop
-#		copy them to the output in order
+		// let h = b = the number of basic code points in the input
+		$h = 0;
+		$b = 0; // see loop
+		// copy them to the output in order
 		$codepoints = self::utf8_to_codepoints($input);
-		$extended = array();
+		$extended   = array();
 
 		foreach ($codepoints as $char) {
 			if ($char < 128) {
@@ -260,35 +262,36 @@ class Requests_IDNAEncoder {
 		$extended = array_keys($extended);
 		sort($extended);
 		$b = $h;
-#		[copy them] followed by a delimiter if b > 0
+		// [copy them] followed by a delimiter if b > 0
 		if (strlen($output) > 0) {
 			$output .= '-';
 		}
-#		{if the input contains a non-basic code point < n then fail}
-#		while h < length(input) do begin
-		while ($h < count($codepoints)) {
-#			let m = the minimum code point >= n in the input
+		// {if the input contains a non-basic code point < n then fail}
+		// while h < length(input) do begin
+		$codepointcount = count($codepoints);
+		while ($h < $codepointcount) {
+			// let m = the minimum code point >= n in the input
 			$m = array_shift($extended);
 			//printf('next code point to insert is %s' . PHP_EOL, dechex($m));
-#			let delta = delta + (m - n) * (h + 1), fail on overflow
+			// let delta = delta + (m - n) * (h + 1), fail on overflow
 			$delta += ($m - $n) * ($h + 1);
-#			let n = m
+			// let n = m
 			$n = $m;
-#			for each code point c in the input (in order) do begin
-			for ($num = 0; $num < count($codepoints); $num++) {
+			// for each code point c in the input (in order) do begin
+			for ($num = 0; $num < $codepointcount; $num++) {
 				$c = $codepoints[$num];
-#				if c < n then increment delta, fail on overflow
+				// if c < n then increment delta, fail on overflow
 				if ($c < $n) {
 					$delta++;
 				}
-#				if c == n then begin
+				// if c == n then begin
 				elseif ($c === $n) {
-#					let q = delta
+					// let q = delta
 					$q = $delta;
-#					for k = base to infinity in steps of base do begin
+					// for k = base to infinity in steps of base do begin
 					for ($k = self::BOOTSTRAP_BASE; ; $k += self::BOOTSTRAP_BASE) {
-#						let t = tmin if k <= bias {+ tmin}, or
-#								tmax if k >= bias + tmax, or k - bias otherwise
+						// let t = tmin if k <= bias {+ tmin}, or
+						//     tmax if k >= bias + tmax, or k - bias otherwise
 						if ($k <= ($bias + self::BOOTSTRAP_TMIN)) {
 							$t = self::BOOTSTRAP_TMIN;
 						}
@@ -298,34 +301,30 @@ class Requests_IDNAEncoder {
 						else {
 							$t = $k - $bias;
 						}
-#						if q < t then break
+						// if q < t then break
 						if ($q < $t) {
 							break;
 						}
-#						output the code point for digit t + ((q - t) mod (base - t))
-						$digit = $t + (($q - $t) % (self::BOOTSTRAP_BASE - $t));
+						// output the code point for digit t + ((q - t) mod (base - t))
+						$digit   = $t + (($q - $t) % (self::BOOTSTRAP_BASE - $t));
 						$output .= self::digit_to_char($digit);
-#						let q = (q - t) div (base - t)
+						// let q = (q - t) div (base - t)
 						$q = floor(($q - $t) / (self::BOOTSTRAP_BASE - $t));
-#					end
-					}
-#					output the code point for digit q
+					} // end
+					// output the code point for digit q
 					$output .= self::digit_to_char($q);
-#					let bias = adapt(delta, h + 1, test h equals b?)
+					// let bias = adapt(delta, h + 1, test h equals b?)
 					$bias = self::adapt($delta, $h + 1, $h === $b);
-#					let delta = 0
+					// let delta = 0
 					$delta = 0;
-#					increment h
+					// increment h
 					$h++;
-#				end
-				}
-#			end
-			}
-#			increment delta and n
+				} // end
+			} // end
+			// increment delta and n
 			$delta++;
 			$n++;
-#		end
-		}
+		} // end
 
 		return $output;
 	}
@@ -358,31 +357,31 @@ class Requests_IDNAEncoder {
 	 * @param int $numpoints
 	 * @param bool $firsttime
 	 * @return int New bias
+	 *
+	 * function adapt(delta,numpoints,firsttime):
 	 */
 	protected static function adapt($delta, $numpoints, $firsttime) {
-#	function adapt(delta,numpoints,firsttime):
-#		if firsttime then let delta = delta div damp
+		// if firsttime then let delta = delta div damp
 		if ($firsttime) {
 			$delta = floor($delta / self::BOOTSTRAP_DAMP);
 		}
-#		else let delta = delta div 2
+		// else let delta = delta div 2
 		else {
 			$delta = floor($delta / 2);
 		}
-#		let delta = delta + (delta div numpoints)
+		// let delta = delta + (delta div numpoints)
 		$delta += floor($delta / $numpoints);
-#		let k = 0
+		// let k = 0
 		$k = 0;
-#		while delta > ((base - tmin) * tmax) div 2 do begin
+		// while delta > ((base - tmin) * tmax) div 2 do begin
 		$max = floor(((self::BOOTSTRAP_BASE - self::BOOTSTRAP_TMIN) * self::BOOTSTRAP_TMAX) / 2);
 		while ($delta > $max) {
-#			let delta = delta div (base - tmin)
+			// let delta = delta div (base - tmin)
 			$delta = floor($delta / (self::BOOTSTRAP_BASE - self::BOOTSTRAP_TMIN));
-#			let k = k + base
+			// let k = k + base
 			$k += self::BOOTSTRAP_BASE;
-#		end
-		}
-#		return k + (((base - tmin + 1) * delta) div (delta + skew))
+		} // end
+		// return k + (((base - tmin + 1) * delta) div (delta + skew))
 		return $k + floor(((self::BOOTSTRAP_BASE - self::BOOTSTRAP_TMIN + 1) * $delta) / ($delta + self::BOOTSTRAP_SKEW));
 	}
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/IPv6.php b/wp-includes/Requests/IPv6.php
index 204dbd7e66..ba88786be6 100644
--- a/wp-includes/Requests/IPv6.php
+++ b/wp-includes/Requests/IPv6.php
@@ -40,8 +40,8 @@ class Requests_IPv6 {
 		}
 
 		list($ip1, $ip2) = explode('::', $ip);
-		$c1 = ($ip1 === '') ? -1 : substr_count($ip1, ':');
-		$c2 = ($ip2 === '') ? -1 : substr_count($ip2, ':');
+		$c1              = ($ip1 === '') ? -1 : substr_count($ip1, ':');
+		$c2              = ($ip2 === '') ? -1 : substr_count($ip2, ':');
 
 		if (strpos($ip2, '.') !== false) {
 			$c2++;
@@ -51,19 +51,19 @@ class Requests_IPv6 {
 			$ip = '0:0:0:0:0:0:0:0';
 		}
 		// ::xxx
-		else if ($c1 === -1) {
+		elseif ($c1 === -1) {
 			$fill = str_repeat('0:', 7 - $c2);
-			$ip = str_replace('::', $fill, $ip);
+			$ip   = str_replace('::', $fill, $ip);
 		}
 		// xxx::
-		else if ($c2 === -1) {
+		elseif ($c2 === -1) {
 			$fill = str_repeat(':0', 7 - $c1);
-			$ip = str_replace('::', $fill, $ip);
+			$ip   = str_replace('::', $fill, $ip);
 		}
 		// xxx::xxx
 		else {
 			$fill = ':' . str_repeat('0:', 6 - $c2 - $c1);
-			$ip = str_replace('::', $fill, $ip);
+			$ip   = str_replace('::', $fill, $ip);
 		}
 		return $ip;
 	}
@@ -84,7 +84,7 @@ class Requests_IPv6 {
 	 */
 	public static function compress($ip) {
 		// Prepare the IP to be compressed
-		$ip = self::uncompress($ip);
+		$ip       = self::uncompress($ip);
 		$ip_parts = self::split_v6_v4($ip);
 
 		// Replace all leading zeros
@@ -126,7 +126,7 @@ class Requests_IPv6 {
 	 */
 	protected static function split_v6_v4($ip) {
 		if (strpos($ip, '.') !== false) {
-			$pos = strrpos($ip, ':');
+			$pos       = strrpos($ip, ':');
 			$ipv6_part = substr($ip, 0, $pos);
 			$ipv4_part = substr($ip, $pos + 1);
 			return array($ipv6_part, $ipv4_part);
@@ -145,10 +145,10 @@ class Requests_IPv6 {
 	 * @return bool true if $ip is a valid IPv6 address
 	 */
 	public static function check_ipv6($ip) {
-		$ip = self::uncompress($ip);
+		$ip                = self::uncompress($ip);
 		list($ipv6, $ipv4) = self::split_v6_v4($ip);
-		$ipv6 = explode(':', $ipv6);
-		$ipv4 = explode('.', $ipv4);
+		$ipv6              = explode(':', $ipv6);
+		$ipv4              = explode('.', $ipv4);
 		if (count($ipv6) === 8 && count($ipv4) === 1 || count($ipv6) === 6 && count($ipv4) === 4) {
 			foreach ($ipv6 as $ipv6_part) {
 				// The section can't be empty
diff --git a/wp-includes/Requests/IRI.php b/wp-includes/Requests/IRI.php
index 8dc2fa2841..5d80e49572 100644
--- a/wp-includes/Requests/IRI.php
+++ b/wp-includes/Requests/IRI.php
@@ -67,28 +67,28 @@ class Requests_IRI {
 	/**
 	 * Scheme
 	 *
-	 * @var string
+	 * @var string|null
 	 */
 	protected $scheme = null;
 
 	/**
 	 * User Information
 	 *
-	 * @var string
+	 * @var string|null
 	 */
 	protected $iuserinfo = null;
 
 	/**
 	 * ihost
 	 *
-	 * @var string
+	 * @var string|null
 	 */
 	protected $ihost = null;
 
 	/**
 	 * Port
 	 *
-	 * @var string
+	 * @var string|null
 	 */
 	protected $port = null;
 
@@ -102,12 +102,12 @@ class Requests_IRI {
 	/**
 	 * iquery
 	 *
-	 * @var string
+	 * @var string|null
 	 */
 	protected $iquery = null;
 
 	/**
-	 * ifragment
+	 * ifragment|null
 	 *
 	 * @var string
 	 */
@@ -118,6 +118,8 @@ class Requests_IRI {
 	 *
 	 * Each key is the scheme, each value is an array with each key as the IRI
 	 * part and value as the default value for that part.
+	 *
+	 * @var array
 	 */
 	protected $normalization = array(
 		'acap' => array(
@@ -249,9 +251,9 @@ class Requests_IRI {
 	 *
 	 * Returns false if $base is not absolute, otherwise an IRI.
 	 *
-	 * @param IRI|string $base (Absolute) Base IRI
-	 * @param IRI|string $relative Relative IRI
-	 * @return IRI|false
+	 * @param Requests_IRI|string $base (Absolute) Base IRI
+	 * @param Requests_IRI|string $relative Relative IRI
+	 * @return Requests_IRI|false
 	 */
 	public static function absolutize($base, $relative) {
 		if (!($relative instanceof Requests_IRI)) {
@@ -419,7 +421,7 @@ class Requests_IRI {
 	 */
 	protected function replace_invalid_with_pct_encoding($string, $extra_chars, $iprivate = false) {
 		// Normalize as many pct-encoded sections as possible
-		$string = preg_replace_callback('/(?:%[A-Fa-f0-9]{2})+/', array(&$this, 'remove_iunreserved_percent_encoded'), $string);
+		$string = preg_replace_callback('/(?:%[A-Fa-f0-9]{2})+/', array($this, 'remove_iunreserved_percent_encoded'), $string);
 
 		// Replace invalid percent characters
 		$string = preg_replace('/%(?![A-Fa-f0-9]{2})/', '%25', $string);
@@ -1010,7 +1012,7 @@ class Requests_IRI {
 	/**
 	 * Get the complete IRI
 	 *
-	 * @return string
+	 * @return string|false
 	 */
 	protected function get_iri() {
 		if (!$this->is_valid()) {
@@ -1047,7 +1049,7 @@ class Requests_IRI {
 	/**
 	 * Get the complete iauthority
 	 *
-	 * @return string
+	 * @return string|null
 	 */
 	protected function get_iauthority() {
 		if ($this->iuserinfo === null && $this->ihost === null && $this->port === null) {
diff --git a/wp-includes/Requests/Proxy.php b/wp-includes/Requests/Proxy.php
index ac7c1d6b08..0a798dbe9e 100644
--- a/wp-includes/Requests/Proxy.php
+++ b/wp-includes/Requests/Proxy.php
@@ -31,5 +31,5 @@ interface Requests_Proxy {
 	 * @see Requests_Hooks::register
 	 * @param Requests_Hooks $hooks Hook system
 	 */
-	public function register(Requests_Hooks &$hooks);
-}
\ No newline at end of file
+	public function register(Requests_Hooks $hooks);
+}
diff --git a/wp-includes/Requests/Proxy/HTTP.php b/wp-includes/Requests/Proxy/HTTP.php
index 6b4aba8127..25bb95a94a 100644
--- a/wp-includes/Requests/Proxy/HTTP.php
+++ b/wp-includes/Requests/Proxy/HTTP.php
@@ -59,12 +59,12 @@ class Requests_Proxy_HTTP implements Requests_Proxy {
 			$this->proxy = $args;
 		}
 		elseif (is_array($args)) {
-			if (count($args) == 1) {
+			if (count($args) === 1) {
 				list($this->proxy) = $args;
 			}
-			elseif (count($args) == 3) {
+			elseif (count($args) === 3) {
 				list($this->proxy, $this->user, $this->pass) = $args;
-				$this->use_authentication = true;
+				$this->use_authentication                    = true;
 			}
 			else {
 				throw new Requests_Exception('Invalid number of arguments', 'proxyhttpbadargs');
@@ -82,13 +82,13 @@ class Requests_Proxy_HTTP implements Requests_Proxy {
 	 * @see fsockopen_header
 	 * @param Requests_Hooks $hooks Hook system
 	 */
-	public function register(Requests_Hooks &$hooks) {
-		$hooks->register('curl.before_send', array(&$this, 'curl_before_send'));
+	public function register(Requests_Hooks $hooks) {
+		$hooks->register('curl.before_send', array($this, 'curl_before_send'));
 
-		$hooks->register('fsockopen.remote_socket', array(&$this, 'fsockopen_remote_socket'));
-		$hooks->register('fsockopen.remote_host_path', array(&$this, 'fsockopen_remote_host_path'));
+		$hooks->register('fsockopen.remote_socket', array($this, 'fsockopen_remote_socket'));
+		$hooks->register('fsockopen.remote_host_path', array($this, 'fsockopen_remote_host_path'));
 		if ($this->use_authentication) {
-			$hooks->register('fsockopen.after_headers', array(&$this, 'fsockopen_header'));
+			$hooks->register('fsockopen.after_headers', array($this, 'fsockopen_header'));
 		}
 	}
 
@@ -148,4 +148,4 @@ class Requests_Proxy_HTTP implements Requests_Proxy {
 	public function get_auth_string() {
 		return $this->user . ':' . $this->pass;
 	}
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Response.php b/wp-includes/Requests/Response.php
index 3152fb6dca..20861dfb82 100644
--- a/wp-includes/Requests/Response.php
+++ b/wp-includes/Requests/Response.php
@@ -51,6 +51,7 @@ class Requests_Response {
 
 	/**
 	 * Protocol version, false if non-blocking
+	 *
 	 * @var float|boolean
 	 */
 	public $protocol_version = false;
@@ -97,7 +98,7 @@ class Requests_Response {
 	 */
 	public function is_redirect() {
 		$code = $this->status_code;
-		return in_array($code, array(300, 301, 302, 303, 307)) || $code > 307 && $code < 400;
+		return in_array($code, array(300, 301, 302, 303, 307), true) || $code > 307 && $code < 400;
 	}
 
 	/**
diff --git a/wp-includes/Requests/Response/Headers.php b/wp-includes/Requests/Response/Headers.php
index cc6a20872e..12db128ae5 100644
--- a/wp-includes/Requests/Response/Headers.php
+++ b/wp-includes/Requests/Response/Headers.php
@@ -21,7 +21,7 @@ class Requests_Response_Headers extends Requests_Utility_CaseInsensitiveDictiona
 	 * Set-Cookie headers.
 	 *
 	 * @param string $key
-	 * @return string Header value
+	 * @return string|null Header value
 	 */
 	public function offsetGet($key) {
 		$key = strtolower($key);
@@ -58,7 +58,7 @@ class Requests_Response_Headers extends Requests_Utility_CaseInsensitiveDictiona
 	 * Get all values for a given header
 	 *
 	 * @param string $key
-	 * @return array Header values
+	 * @return array|null Header values
 	 */
 	public function getValues($key) {
 		$key = strtolower($key);
diff --git a/wp-includes/Requests/SSL.php b/wp-includes/Requests/SSL.php
index 7d8af850a5..f7ecf3fbdb 100644
--- a/wp-includes/Requests/SSL.php
+++ b/wp-includes/Requests/SSL.php
@@ -20,7 +20,6 @@ class Requests_SSL {
 	 *
 	 * Unfortunately, PHP doesn't check the certificate against the alternative
 	 * names, leading things like 'https://www.github.com/' to be invalid.
-	 * Instead
 	 *
 	 * @see https://tools.ietf.org/html/rfc2818#section-3.1 RFC2818, Section 3.1
 	 *
@@ -30,13 +29,6 @@ class Requests_SSL {
 	 * @return bool
 	 */
 	public static function verify_certificate($host, $cert) {
-		// Calculate the valid wildcard match if the host is not an IP address
-		$parts = explode('.', $host);
-		if (ip2long($host) === false) {
-			$parts[0] = '*';
-		}
-		$wildcard = implode('.', $parts);
-
 		$has_dns_alt = false;
 
 		// Check the subjectAltName
@@ -139,7 +131,7 @@ class Requests_SSL {
 		// Also validates that the host has 3 parts or more, as per Firefox's
 		// ruleset.
 		if (ip2long($host) === false) {
-			$parts = explode('.', $host);
+			$parts    = explode('.', $host);
 			$parts[0] = '*';
 			$wildcard = implode('.', $parts);
 			if ($wildcard === $reference) {
diff --git a/wp-includes/Requests/Session.php b/wp-includes/Requests/Session.php
index af14bbe416..b2e10991d6 100644
--- a/wp-includes/Requests/Session.php
+++ b/wp-includes/Requests/Session.php
@@ -22,12 +22,14 @@ class Requests_Session {
 	 * Base URL for requests
 	 *
 	 * URLs will be made absolute using this as the base
+	 *
 	 * @var string|null
 	 */
 	public $url = null;
 
 	/**
 	 * Base headers for requests
+	 *
 	 * @var array
 	 */
 	public $headers = array();
@@ -64,9 +66,9 @@ class Requests_Session {
 	 * @param array $options Default options for requests
 	 */
 	public function __construct($url = null, $headers = array(), $data = array(), $options = array()) {
-		$this->url = $url;
+		$this->url     = $url;
 		$this->headers = $headers;
-		$this->data = $data;
+		$this->data    = $data;
 		$this->options = $options;
 
 		if (empty($this->options['cookies'])) {
diff --git a/wp-includes/Requests/Transport.php b/wp-includes/Requests/Transport.php
index 7e4a26293a..5146c01d87 100644
--- a/wp-includes/Requests/Transport.php
+++ b/wp-includes/Requests/Transport.php
@@ -38,4 +38,4 @@ interface Requests_Transport {
 	 * @return bool
 	 */
 	public static function test();
-}
\ No newline at end of file
+}
diff --git a/wp-includes/Requests/Transport/cURL.php b/wp-includes/Requests/Transport/cURL.php
index 4429edb647..01bcf3b719 100644
--- a/wp-includes/Requests/Transport/cURL.php
+++ b/wp-includes/Requests/Transport/cURL.php
@@ -38,9 +38,9 @@ class Requests_Transport_cURL implements Requests_Transport {
 	public $info;
 
 	/**
-	 * Version string
+	 * cURL version number
 	 *
-	 * @var long
+	 * @var int
 	 */
 	public $version;
 
@@ -90,9 +90,9 @@ class Requests_Transport_cURL implements Requests_Transport {
 	 * Constructor
 	 */
 	public function __construct() {
-		$curl = curl_version();
+		$curl          = curl_version();
 		$this->version = $curl['version_number'];
-		$this->handle = curl_init();
+		$this->handle  = curl_init();
 
 		curl_setopt($this->handle, CURLOPT_HEADER, false);
 		curl_setopt($this->handle, CURLOPT_RETURNTRANSFER, 1);
@@ -100,9 +100,11 @@ class Requests_Transport_cURL implements Requests_Transport {
 			curl_setopt($this->handle, CURLOPT_ENCODING, '');
 		}
 		if (defined('CURLOPT_PROTOCOLS')) {
+			// phpcs:ignore PHPCompatibility.Constants.NewConstants.curlopt_protocolsFound
 			curl_setopt($this->handle, CURLOPT_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS);
 		}
 		if (defined('CURLOPT_REDIR_PROTOCOLS')) {
+			// phpcs:ignore PHPCompatibility.Constants.NewConstants.curlopt_redir_protocolsFound
 			curl_setopt($this->handle, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS);
 		}
 	}
@@ -138,8 +140,8 @@ class Requests_Transport_cURL implements Requests_Transport {
 			$this->stream_handle = fopen($options['filename'], 'wb');
 		}
 
-		$this->response_data = '';
-		$this->response_bytes = 0;
+		$this->response_data       = '';
+		$this->response_bytes      = 0;
 		$this->response_byte_limit = false;
 		if ($options['max_bytes'] !== false) {
 			$this->response_byte_limit = $options['max_bytes'];
@@ -168,7 +170,7 @@ class Requests_Transport_cURL implements Requests_Transport {
 			// Reset encoding and try again
 			curl_setopt($this->handle, CURLOPT_ENCODING, 'none');
 
-			$this->response_data = '';
+			$this->response_data  = '';
 			$this->response_bytes = 0;
 			curl_exec($this->handle);
 			$response = $this->response_data;
@@ -199,23 +201,24 @@ class Requests_Transport_cURL implements Requests_Transport {
 
 		$multihandle = curl_multi_init();
 		$subrequests = array();
-		$subhandles = array();
+		$subhandles  = array();
 
 		$class = get_class($this);
 		foreach ($requests as $id => $request) {
 			$subrequests[$id] = new $class();
-			$subhandles[$id] = $subrequests[$id]->get_subrequest_handle($request['url'], $request['headers'], $request['data'], $request['options']);
+			$subhandles[$id]  = $subrequests[$id]->get_subrequest_handle($request['url'], $request['headers'], $request['data'], $request['options']);
 			$request['options']['hooks']->dispatch('curl.before_multi_add', array(&$subhandles[$id]));
 			curl_multi_add_handle($multihandle, $subhandles[$id]);
 		}
 
-		$completed = 0;
-		$responses = array();
+		$completed       = 0;
+		$responses       = array();
+		$subrequestcount = count($subrequests);
 
 		$request['options']['hooks']->dispatch('curl.before_multi_exec', array(&$multihandle));
 
 		do {
-			$active = false;
+			$active = 0;
 
 			do {
 				$status = curl_multi_exec($multihandle, $active);
@@ -235,15 +238,15 @@ class Requests_Transport_cURL implements Requests_Transport {
 			// Parse the finished requests before we start getting the new ones
 			foreach ($to_process as $key => $done) {
 				$options = $requests[$key]['options'];
-				if (CURLE_OK !== $done['result']) {
+				if ($done['result'] !== CURLE_OK) {
 					//get error string for handle.
-					$reason = curl_error($done['handle']);
-					$exception = new Requests_Exception_Transport_cURL(
-									$reason,
-									Requests_Exception_Transport_cURL::EASY,
-									$done['handle'],
-									$done['result']
-								);
+					$reason          = curl_error($done['handle']);
+					$exception       = new Requests_Exception_Transport_cURL(
+						$reason,
+						Requests_Exception_Transport_cURL::EASY,
+						$done['handle'],
+						$done['result']
+					);
 					$responses[$key] = $exception;
 					$options['hooks']->dispatch('transport.internal.parse_error', array(&$responses[$key], $requests[$key]));
 				}
@@ -262,7 +265,7 @@ class Requests_Transport_cURL implements Requests_Transport {
 				$completed++;
 			}
 		}
-		while ($active || $completed < count($subrequests));
+		while ($active || $completed < $subrequestcount);
 
 		$request['options']['hooks']->dispatch('curl.after_multi_exec', array(&$multihandle));
 
@@ -287,8 +290,8 @@ class Requests_Transport_cURL implements Requests_Transport {
 			$this->stream_handle = fopen($options['filename'], 'wb');
 		}
 
-		$this->response_data = '';
-		$this->response_bytes = 0;
+		$this->response_data       = '';
+		$this->response_bytes      = 0;
 		$this->response_byte_limit = false;
 		if ($options['max_bytes'] !== false) {
 			$this->response_byte_limit = $options['max_bytes'];
@@ -310,17 +313,32 @@ class Requests_Transport_cURL implements Requests_Transport {
 		$options['hooks']->dispatch('curl.before_request', array(&$this->handle));
 
 		// Force closing the connection for old versions of cURL (<7.22).
-		if ( ! isset( $headers['Connection'] ) ) {
+		if (!isset($headers['Connection'])) {
 			$headers['Connection'] = 'close';
 		}
 
+		/**
+		 * Add "Expect" header.
+		 *
+		 * By default, cURL adds a "Expect: 100-Continue" to most requests. This header can
+		 * add as much as a second to the time it takes for cURL to perform a request. To
+		 * prevent this, we need to set an empty "Expect" header. To match the behaviour of
+		 * Guzzle, we'll add the empty header to requests that are smaller than 1 MB and use
+		 * HTTP/1.1.
+		 *
+		 * https://curl.se/mail/lib-2017-07/0013.html
+		 */
+		if (!isset($headers['Expect']) && $options['protocol_version'] === 1.1) {
+			$headers['Expect'] = $this->get_expect_header($data);
+		}
+
 		$headers = Requests::flatten($headers);
 
 		if (!empty($data)) {
 			$data_format = $options['data_format'];
 
 			if ($data_format === 'query') {
-				$url = self::format_get($url, $data);
+				$url  = self::format_get($url, $data);
 				$data = '';
 			}
 			elseif (!is_string($data)) {
@@ -363,6 +381,7 @@ class Requests_Transport_cURL implements Requests_Transport {
 			curl_setopt($this->handle, CURLOPT_TIMEOUT, ceil($timeout));
 		}
 		else {
+			// phpcs:ignore PHPCompatibility.Constants.NewConstants.curlopt_timeout_msFound
 			curl_setopt($this->handle, CURLOPT_TIMEOUT_MS, round($timeout * 1000));
 		}
 
@@ -370,6 +389,7 @@ class Requests_Transport_cURL implements Requests_Transport {
 			curl_setopt($this->handle, CURLOPT_CONNECTTIMEOUT, ceil($options['connect_timeout']));
 		}
 		else {
+			// phpcs:ignore PHPCompatibility.Constants.NewConstants.curlopt_connecttimeout_msFound
 			curl_setopt($this->handle, CURLOPT_CONNECTTIMEOUT_MS, round($options['connect_timeout'] * 1000));
 		}
 		curl_setopt($this->handle, CURLOPT_URL, $url);
@@ -385,9 +405,9 @@ class Requests_Transport_cURL implements Requests_Transport {
 			curl_setopt($this->handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
 		}
 
-		if (true === $options['blocking']) {
-			curl_setopt($this->handle, CURLOPT_HEADERFUNCTION, array(&$this, 'stream_headers'));
-			curl_setopt($this->handle, CURLOPT_WRITEFUNCTION, array(&$this, 'stream_body'));
+		if ($options['blocking'] === true) {
+			curl_setopt($this->handle, CURLOPT_HEADERFUNCTION, array($this, 'stream_headers'));
+			curl_setopt($this->handle, CURLOPT_WRITEFUNCTION, array($this, 'stream_body'));
 			curl_setopt($this->handle, CURLOPT_BUFFERSIZE, Requests::BUFFER_SIZE);
 		}
 	}
@@ -397,7 +417,8 @@ class Requests_Transport_cURL implements Requests_Transport {
 	 *
 	 * @param string $response Response data from the body
 	 * @param array $options Request options
-	 * @return string HTTP response data including headers
+	 * @return string|false HTTP response data including headers. False if non-blocking.
+	 * @throws Requests_Exception
 	 */
 	public function process_response($response, $options) {
 		if ($options['blocking'] === false) {
@@ -405,7 +426,7 @@ class Requests_Transport_cURL implements Requests_Transport {
 			$options['hooks']->dispatch('curl.after_request', array(&$fake_headers));
 			return false;
 		}
-		if ($options['filename'] !== false) {
+		if ($options['filename'] !== false && $this->stream_handle) {
 			fclose($this->stream_handle);
 			$this->headers = trim($this->headers);
 		}
@@ -439,7 +460,7 @@ class Requests_Transport_cURL implements Requests_Transport {
 		// interim responses, such as a 100 Continue. We don't need that.
 		// (We may want to keep this somewhere just in case)
 		if ($this->done_headers) {
-			$this->headers = '';
+			$this->headers      = '';
 			$this->done_headers = false;
 		}
 		$this->headers .= $headers;
@@ -473,7 +494,7 @@ class Requests_Transport_cURL implements Requests_Transport {
 			if (($this->response_bytes + $data_length) > $this->response_byte_limit) {
 				// Limit the length
 				$limited_length = ($this->response_byte_limit - $this->response_bytes);
-				$data = substr($data, 0, $limited_length);
+				$data           = substr($data, 0, $limited_length);
 			}
 		}
 
@@ -497,16 +518,17 @@ class Requests_Transport_cURL implements Requests_Transport {
 	 */
 	protected static function format_get($url, $data) {
 		if (!empty($data)) {
+			$query     = '';
 			$url_parts = parse_url($url);
 			if (empty($url_parts['query'])) {
-				$query = $url_parts['query'] = '';
+				$url_parts['query'] = '';
 			}
 			else {
 				$query = $url_parts['query'];
 			}
 
 			$query .= '&' . http_build_query($data, null, '&');
-			$query = trim($query, '&');
+			$query  = trim($query, '&');
 
 			if (empty($url_parts['query'])) {
 				$url .= '?' . $query;
@@ -539,4 +561,29 @@ class Requests_Transport_cURL implements Requests_Transport {
 
 		return true;
 	}
+
+	/**
+	 * Get the correct "Expect" header for the given request data.
+	 *
+	 * @param string|array $data Data to send either as the POST body, or as parameters in the URL for a GET/HEAD.
+	 * @return string The "Expect" header.
+	 */
+	protected function get_expect_header($data) {
+		if (!is_array($data)) {
+			return strlen((string) $data) >= 1048576 ? '100-Continue' : '';
+		}
+
+		$bytesize = 0;
+		$iterator = new RecursiveIteratorIterator(new RecursiveArrayIterator($data));
+
+		foreach ($iterator as $datum) {
+			$bytesize += strlen((string) $datum);
+
+			if ($bytesize >= 1048576) {
+				return '100-Continue';
+			}
+		}
+
+		return '';
+	}
 }
diff --git a/wp-includes/Requests/Transport/fsockopen.php b/wp-includes/Requests/Transport/fsockopen.php
index c7c61d3b13..56f94c99f2 100644
--- a/wp-includes/Requests/Transport/fsockopen.php
+++ b/wp-includes/Requests/Transport/fsockopen.php
@@ -62,9 +62,9 @@ class Requests_Transport_fsockopen implements Requests_Transport {
 		if (empty($url_parts)) {
 			throw new Requests_Exception('Invalid URL.', 'invalidurl', $url);
 		}
-		$host = $url_parts['host'];
-		$context = stream_context_create();
-		$verifyname = false;
+		$host                     = $url_parts['host'];
+		$context                  = stream_context_create();
+		$verifyname               = false;
 		$case_insensitive_headers = new Requests_Utility_CaseInsensitiveDictionary($headers);
 
 		// HTTPS support
@@ -75,13 +75,13 @@ class Requests_Transport_fsockopen implements Requests_Transport {
 			}
 
 			$context_options = array(
-				'verify_peer' => true,
-				// 'CN_match' => $host,
-				'capture_peer_cert' => true
+				'verify_peer'       => true,
+				'capture_peer_cert' => true,
 			);
-			$verifyname = true;
+			$verifyname      = true;
 
 			// SNI, if enabled (OpenSSL >=0.9.8j)
+			// phpcs:ignore PHPCompatibility.Constants.NewConstants.openssl_tlsext_server_nameFound
 			if (defined('OPENSSL_TLSEXT_SERVER_NAME') && OPENSSL_TLSEXT_SERVER_NAME) {
 				$context_options['SNI_enabled'] = true;
 				if (isset($options['verifyname']) && $options['verifyname'] === false) {
@@ -91,7 +91,9 @@ class Requests_Transport_fsockopen implements Requests_Transport {
 
 			if (isset($options['verify'])) {
 				if ($options['verify'] === false) {
-					$context_options['verify_peer'] = false;
+					$context_options['verify_peer']      = false;
+					$context_options['verify_peer_name'] = false;
+					$verifyname                          = false;
 				}
 				elseif (is_string($options['verify'])) {
 					$context_options['cafile'] = $options['verify'];
@@ -100,7 +102,7 @@ class Requests_Transport_fsockopen implements Requests_Transport {
 
 			if (isset($options['verifyname']) && $options['verifyname'] === false) {
 				$context_options['verify_peer_name'] = false;
-				$verifyname = false;
+				$verifyname                          = false;
 			}
 
 			stream_context_set_option($context, array('ssl' => $context_options));
@@ -116,6 +118,7 @@ class Requests_Transport_fsockopen implements Requests_Transport {
 		}
 		$remote_socket .= ':' . $url_parts['port'];
 
+		// phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_set_error_handler
 		set_error_handler(array($this, 'connect_error_handler'), E_WARNING | E_NOTICE);
 
 		$options['hooks']->dispatch('fsockopen.remote_socket', array(&$remote_socket));
@@ -150,17 +153,19 @@ class Requests_Transport_fsockopen implements Requests_Transport {
 		$options['hooks']->dispatch('fsockopen.remote_host_path', array(&$path, $url));
 
 		$request_body = '';
-		$out = sprintf("%s %s HTTP/%.1F\r\n", $options['type'], $path, $options['protocol_version']);
+		$out          = sprintf("%s %s HTTP/%.1F\r\n", $options['type'], $path, $options['protocol_version']);
 
 		if ($options['type'] !== Requests::TRACE) {
 			if (is_array($data)) {
-				$request_body = http_build_query($data, null, '&');
+				$request_body = http_build_query($data, '', '&');
 			}
 			else {
 				$request_body = $data;
 			}
 
-			if (!empty($data)) {
+			// Always include Content-length on POST requests to prevent
+			// 411 errors from some servers when the body is empty.
+			if (!empty($data) || $options['type'] === Requests::POST) {
 				if (!isset($case_insensitive_headers['Content-Length'])) {
 					$headers['Content-Length'] = strlen($request_body);
 				}
@@ -174,7 +179,7 @@ class Requests_Transport_fsockopen implements Requests_Transport {
 		if (!isset($case_insensitive_headers['Host'])) {
 			$out .= sprintf('Host: %s', $url_parts['host']);
 
-			if (( 'http' === strtolower($url_parts['scheme']) && $url_parts['port'] !== 80 ) || ( 'https' === strtolower($url_parts['scheme']) && $url_parts['port'] !== 443 )) {
+			if ((strtolower($url_parts['scheme']) === 'http' && $url_parts['port'] !== 80) || (strtolower($url_parts['scheme']) === 'https' && $url_parts['port'] !== 443)) {
 				$out .= ':' . $url_parts['port'];
 			}
 			$out .= "\r\n";
@@ -220,7 +225,7 @@ class Requests_Transport_fsockopen implements Requests_Transport {
 		}
 
 		$timeout_sec = (int) floor($options['timeout']);
-		if ($timeout_sec == $options['timeout']) {
+		if ($timeout_sec === $options['timeout']) {
 			$timeout_msec = 0;
 		}
 		else {
@@ -228,11 +233,13 @@ class Requests_Transport_fsockopen implements Requests_Transport {
 		}
 		stream_set_timeout($socket, $timeout_sec, $timeout_msec);
 
-		$response = $body = $headers = '';
+		$response   = '';
+		$body       = '';
+		$headers    = '';
 		$this->info = stream_get_meta_data($socket);
-		$size = 0;
-		$doingbody = false;
-		$download = false;
+		$size       = 0;
+		$doingbody  = false;
+		$download   = false;
 		if ($options['filename']) {
 			$download = fopen($options['filename'], 'wb');
 		}
@@ -248,7 +255,7 @@ class Requests_Transport_fsockopen implements Requests_Transport {
 				$response .= $block;
 				if (strpos($response, "\r\n\r\n")) {
 					list($headers, $block) = explode("\r\n\r\n", $response, 2);
-					$doingbody = true;
+					$doingbody             = true;
 				}
 			}
 
@@ -264,7 +271,7 @@ class Requests_Transport_fsockopen implements Requests_Transport {
 					if (($size + $data_length) > $this->max_bytes) {
 						// Limit the length
 						$limited_length = ($this->max_bytes - $size);
-						$block = substr($block, 0, $limited_length);
+						$block          = substr($block, 0, $limited_length);
 					}
 				}
 
@@ -300,10 +307,10 @@ class Requests_Transport_fsockopen implements Requests_Transport {
 	 */
 	public function request_multiple($requests, $options) {
 		$responses = array();
-		$class = get_class($this);
+		$class     = get_class($this);
 		foreach ($requests as $id => $request) {
 			try {
-				$handler = new $class();
+				$handler        = new $class();
 				$responses[$id] = $handler->request($request['url'], $request['headers'], $request['data'], $request['options']);
 
 				$request['options']['hooks']->dispatch('transport.internal.parse_response', array(&$responses[$id], $request));
@@ -353,8 +360,8 @@ class Requests_Transport_fsockopen implements Requests_Transport {
 				$url_parts['query'] = '';
 			}
 
-			$url_parts['query'] .= '&' . http_build_query($data, null, '&');
-			$url_parts['query'] = trim($url_parts['query'], '&');
+			$url_parts['query'] .= '&' . http_build_query($data, '', '&');
+			$url_parts['query']  = trim($url_parts['query'], '&');
 		}
 		if (isset($url_parts['path'])) {
 			if (isset($url_parts['query'])) {
diff --git a/wp-includes/Requests/Utility/CaseInsensitiveDictionary.php b/wp-includes/Requests/Utility/CaseInsensitiveDictionary.php
index 2c97893a17..7eebeb7a72 100644
--- a/wp-includes/Requests/Utility/CaseInsensitiveDictionary.php
+++ b/wp-includes/Requests/Utility/CaseInsensitiveDictionary.php
@@ -46,7 +46,7 @@ class Requests_Utility_CaseInsensitiveDictionary implements ArrayAccess, Iterato
 	 * Get the value for the item
 	 *
 	 * @param string $key Item key
-	 * @return string Item value
+	 * @return string|null Item value (null if offsetExists is false)
 	 */
 	public function offsetGet($key) {
 		$key = strtolower($key);
@@ -70,7 +70,7 @@ class Requests_Utility_CaseInsensitiveDictionary implements ArrayAccess, Iterato
 			throw new Requests_Exception('Object is a dictionary, not a list', 'invalidset');
 		}
 
-		$key = strtolower($key);
+		$key              = strtolower($key);
 		$this->data[$key] = $value;
 	}
 
diff --git a/wp-includes/Requests/Utility/FilteredIterator.php b/wp-includes/Requests/Utility/FilteredIterator.php
index 0e27944932..7c6c2c0238 100644
--- a/wp-includes/Requests/Utility/FilteredIterator.php
+++ b/wp-includes/Requests/Utility/FilteredIterator.php
@@ -39,23 +39,27 @@ class Requests_Utility_FilteredIterator extends ArrayIterator {
 	 */
 	public function current() {
 		$value = parent::current();
-		$value = call_user_func($this->callback, $value);
+
+		if (is_callable($this->callback)) {
+			$value = call_user_func($this->callback, $value);
+		}
+
 		return $value;
 	}
 
 	/**
 	 * @inheritdoc
 	 */
-	public function unserialize( $serialized ) {
-	}
+	public function unserialize($serialized) {}
 
 	/**
 	 * @inheritdoc
+	 *
+	 * @phpcs:disable PHPCompatibility.FunctionNameRestrictions.ReservedFunctionNames.MethodDoubleUnderscore,PHPCompatibility.FunctionNameRestrictions.NewMagicMethods.__unserializeFound
 	 */
-	public function __unserialize( $serialized ) { // phpcs:ignore PHPCompatibility.FunctionNameRestrictions.ReservedFunctionNames.MethodDoubleUnderscore,PHPCompatibility.FunctionNameRestrictions.NewMagicMethods.__unserializeFound
-	}
+	public function __unserialize($serialized) {}
 
-	public function __wakeup() { // phpcs:ignore PHPCompatibility.FunctionNameRestrictions.ReservedFunctionNames.MethodDoubleUnderscore,PHPCompatibility.FunctionNameRestrictions.NewMagicMethods.__wakeupFound
-		unset( $this->callback );
+	public function __wakeup() {
+		unset($this->callback);
 	}
 }
diff --git a/wp-includes/class-requests.php b/wp-includes/class-requests.php
index 34f7b6121b..997bfa84ed 100644
--- a/wp-includes/class-requests.php
+++ b/wp-includes/class-requests.php
@@ -88,7 +88,7 @@ class Requests {
 	 *
 	 * @var string
 	 */
-	const VERSION = '1.7-3470169';
+	const VERSION = '1.7';
 
 	/**
 	 * Registered transport classes
@@ -143,7 +143,7 @@ class Requests {
 
 		$file = str_replace('_', '/', $class);
 		if (file_exists(dirname(__FILE__) . '/' . $file . '.php')) {
-			require_once(dirname(__FILE__) . '/' . $file . '.php');
+			require_once dirname(__FILE__) . '/' . $file . '.php';
 		}
 	}
 
@@ -342,7 +342,7 @@ class Requests {
 	 *    across transports.)
 	 *    (string|boolean, default: library/Requests/Transport/cacert.pem)
 	 * - `verifyname`: Should we verify the common name in the SSL certificate?
-	 *    (boolean: default, true)
+	 *    (boolean, default: true)
 	 * - `data_format`: How should we send the `$data` parameter?
 	 *    (string, one of 'query' or 'body', default: 'query' for
 	 *    HEAD/GET/DELETE, 'body' for POST/PUT/OPTIONS/PATCH)
@@ -374,9 +374,9 @@ class Requests {
 			}
 		}
 		else {
-			$need_ssl = (0 === stripos($url, 'https://'));
+			$need_ssl     = (stripos($url, 'https://') === 0);
 			$capabilities = array('ssl' => $need_ssl);
-			$transport = self::get_transport($capabilities);
+			$transport    = self::get_transport($capabilities);
 		}
 		$response = $transport->request($url, $headers, $data, $options);
 
@@ -447,7 +447,7 @@ class Requests {
 				$request['type'] = self::GET;
 			}
 			if (!isset($request['options'])) {
-				$request['options'] = $options;
+				$request['options']         = $options;
 				$request['options']['type'] = $request['type'];
 			}
 			else {
@@ -503,25 +503,25 @@ class Requests {
 	 */
 	protected static function get_default_options($multirequest = false) {
 		$defaults = array(
-			'timeout' => 10,
-			'connect_timeout' => 10,
-			'useragent' => 'php-requests/' . self::VERSION,
+			'timeout'          => 10,
+			'connect_timeout'  => 10,
+			'useragent'        => 'php-requests/' . self::VERSION,
 			'protocol_version' => 1.1,
-			'redirected' => 0,
-			'redirects' => 10,
+			'redirected'       => 0,
+			'redirects'        => 10,
 			'follow_redirects' => true,
-			'blocking' => true,
-			'type' => self::GET,
-			'filename' => false,
-			'auth' => false,
-			'proxy' => false,
-			'cookies' => false,
-			'max_bytes' => false,
-			'idn' => true,
-			'hooks' => null,
-			'transport' => null,
-			'verify' => Requests::get_certificate_path(),
-			'verifyname' => true,
+			'blocking'         => true,
+			'type'             => self::GET,
+			'filename'         => false,
+			'auth'             => false,
+			'proxy'            => false,
+			'cookies'          => false,
+			'max_bytes'        => false,
+			'idn'              => true,
+			'hooks'            => null,
+			'transport'        => null,
+			'verify'           => self::get_certificate_path(),
+			'verifyname'       => true,
 		);
 		if ($multirequest !== false) {
 			$defaults['complete'] = null;
@@ -535,8 +535,8 @@ class Requests {
 	 * @return string Default certificate path.
 	 */
 	public static function get_certificate_path() {
-		if ( ! empty( Requests::$certificate_path ) ) {
-			return Requests::$certificate_path;
+		if (!empty(self::$certificate_path)) {
+			return self::$certificate_path;
 		}
 
 		return dirname(__FILE__) . '/Requests/Transport/cacert.pem';
@@ -547,8 +547,8 @@ class Requests {
 	 *
 	 * @param string $path Certificate path, pointing to a PEM file.
 	 */
-	public static function set_certificate_path( $path ) {
-		Requests::$certificate_path = $path;
+	public static function set_certificate_path($path) {
+		self::$certificate_path = $path;
 	}
 
 	/**
@@ -595,16 +595,16 @@ class Requests {
 		}
 
 		if ($options['idn'] !== false) {
-			$iri = new Requests_IRI($url);
+			$iri       = new Requests_IRI($url);
 			$iri->host = Requests_IDNAEncoder::encode($iri->ihost);
-			$url = $iri->uri;
+			$url       = $iri->uri;
 		}
 
 		// Massage the type to ensure we support it.
 		$type = strtoupper($type);
 
 		if (!isset($options['data_format'])) {
-			if (in_array($type, array(self::HEAD, self::GET, self::DELETE))) {
+			if (in_array($type, array(self::HEAD, self::GET, self::DELETE), true)) {
 				$options['data_format'] = 'query';
 			}
 			else {
@@ -633,20 +633,23 @@ class Requests {
 			return $return;
 		}
 
-		$return->raw = $headers;
-		$return->url = $url;
+		$return->raw  = $headers;
+		$return->url  = (string) $url;
+		$return->body = '';
 
 		if (!$options['filename']) {
-			if (($pos = strpos($headers, "\r\n\r\n")) === false) {
+			$pos = strpos($headers, "\r\n\r\n");
+			if ($pos === false) {
 				// Crap!
 				throw new Requests_Exception('Missing header/body separator', 'requests.no_crlf_separator');
 			}
 
 			$headers = substr($return->raw, 0, $pos);
-			$return->body = substr($return->raw, $pos + strlen("\n\r\n\r"));
-		}
-		else {
-			$return->body = '';
+			// Headers will always be separated from the body by two new lines - `\n\r\n\r`.
+			$body = substr($return->raw, $pos + 4);
+			if (!empty($body)) {
+				$return->body = $body;
+			}
 		}
 		// Pretend CRLF = LF for compatibility (RFC 2616, section 19.3)
 		$headers = str_replace("\r\n", "\n", $headers);
@@ -658,14 +661,14 @@ class Requests {
 			throw new Requests_Exception('Response could not be parsed', 'noversion', $headers);
 		}
 		$return->protocol_version = (float) $matches[1];
-		$return->status_code = (int) $matches[2];
+		$return->status_code      = (int) $matches[2];
 		if ($return->status_code >= 200 && $return->status_code < 300) {
 			$return->success = true;
 		}
 
 		foreach ($headers as $header) {
 			list($key, $value) = explode(':', $header, 2);
-			$value = trim($value);
+			$value             = trim($value);
 			preg_replace('#(\s+)#i', ' ', $value);
 			$return->headers[$key] = $value;
 		}
@@ -702,10 +705,10 @@ class Requests {
 					&$req_headers,
 					&$req_data,
 					&$options,
-					$return
+					$return,
 				);
 				$options['hooks']->dispatch('requests.before_redirect', $hook_args);
-				$redirected = self::request($location, $req_headers, $req_data, $options['type'], $options);
+				$redirected            = self::request($location, $req_headers, $req_data, $options['type'], $options);
 				$redirected->history[] = $return;
 				return $redirected;
 			}
@@ -732,10 +735,10 @@ class Requests {
 	 */
 	public static function parse_multiple(&$response, $request) {
 		try {
-			$url = $request['url'];
-			$headers = $request['headers'];
-			$data = $request['data'];
-			$options = $request['options'];
+			$url      = $request['url'];
+			$headers  = $request['headers'];
+			$data     = $request['data'];
+			$options  = $request['options'];
 			$response = self::parse_response($response, $url, $headers, $data, $options);
 		}
 		catch (Requests_Exception $e) {
@@ -755,8 +758,6 @@ class Requests {
 			return $data;
 		}
 
-
-
 		$decoded = '';
 		$encoded = $data;
 
@@ -774,8 +775,8 @@ class Requests {
 			}
 
 			$chunk_length = strlen($matches[0]);
-			$decoded .= substr($encoded, $chunk_length, $length);
-			$encoded = substr($encoded, $chunk_length + $length + 2);
+			$decoded     .= substr($encoded, $chunk_length, $length);
+			$encoded      = substr($encoded, $chunk_length + $length + 2);
 
 			if (trim($encoded) === '0' || empty($encoded)) {
 				return $decoded;
@@ -791,7 +792,7 @@ class Requests {
 	 * Convert a key => value array to a 'key: value' array for headers
 	 *
 	 * @param array $array Dictionary of header values
-	 * @return string[] List of headers
+	 * @return array List of headers
 	 */
 	public static function flatten($array) {
 		$return = array();
@@ -807,7 +808,7 @@ class Requests {
 	 * @codeCoverageIgnore
 	 * @deprecated Misspelling of {@see Requests::flatten}
 	 * @param array $array Dictionary of header values
-	 * @return string[] List of headers
+	 * @return array List of headers
 	 */
 	public static function flattern($array) {
 		return self::flatten($array);
@@ -828,17 +829,31 @@ class Requests {
 			return $data;
 		}
 
-		if (function_exists('gzdecode') && ($decoded = @gzdecode($data)) !== false) {
+		if (function_exists('gzdecode')) {
+			// phpcs:ignore PHPCompatibility.FunctionUse.NewFunctions.gzdecodeFound -- Wrapped in function_exists() for PHP 5.2.
+			$decoded = @gzdecode($data);
+			if ($decoded !== false) {
+				return $decoded;
+			}
+		}
+
+		if (function_exists('gzinflate')) {
+			$decoded = @gzinflate($data);
+			if ($decoded !== false) {
+				return $decoded;
+			}
+		}
+
+		$decoded = self::compatible_gzinflate($data);
+		if ($decoded !== false) {
 			return $decoded;
 		}
-		elseif (function_exists('gzinflate') && ($decoded = @gzinflate($data)) !== false) {
-			return $decoded;
-		}
-		elseif (($decoded = self::compatible_gzinflate($data)) !== false) {
-			return $decoded;
-		}
-		elseif (function_exists('gzuncompress') && ($decoded = @gzuncompress($data)) !== false) {
-			return $decoded;
+
+		if (function_exists('gzuncompress')) {
+			$decoded = @gzuncompress($data);
+			if ($decoded !== false) {
+				return $decoded;
+			}
 		}
 
 		return $data;
@@ -861,32 +876,32 @@ class Requests {
 	 * @link https://secure.php.net/manual/en/function.gzinflate.php#70875
 	 * @link https://secure.php.net/manual/en/function.gzinflate.php#77336
 	 *
-	 * @param string $gzData String to decompress.
+	 * @param string $gz_data String to decompress.
 	 * @return string|bool False on failure.
 	 */
-	public static function compatible_gzinflate($gzData) {
+	public static function compatible_gzinflate($gz_data) {
 		// Compressed data might contain a full zlib header, if so strip it for
 		// gzinflate()
-		if (substr($gzData, 0, 3) == "\x1f\x8b\x08") {
-			$i = 10;
-			$flg = ord(substr($gzData, 3, 1));
+		if (substr($gz_data, 0, 3) === "\x1f\x8b\x08") {
+			$i   = 10;
+			$flg = ord(substr($gz_data, 3, 1));
 			if ($flg > 0) {
 				if ($flg & 4) {
-					list($xlen) = unpack('v', substr($gzData, $i, 2));
-					$i = $i + 2 + $xlen;
+					list($xlen) = unpack('v', substr($gz_data, $i, 2));
+					$i         += 2 + $xlen;
 				}
 				if ($flg & 8) {
-					$i = strpos($gzData, "\0", $i) + 1;
+					$i = strpos($gz_data, "\0", $i) + 1;
 				}
 				if ($flg & 16) {
-					$i = strpos($gzData, "\0", $i) + 1;
+					$i = strpos($gz_data, "\0", $i) + 1;
 				}
 				if ($flg & 2) {
-					$i = $i + 2;
+					$i += 2;
 				}
 			}
-			$decompressed = self::compatible_gzinflate(substr($gzData, $i));
-			if (false !== $decompressed) {
+			$decompressed = self::compatible_gzinflate(substr($gz_data, $i));
+			if ($decompressed !== false) {
 				return $decompressed;
 			}
 		}
@@ -902,57 +917,61 @@ class Requests {
 		$huffman_encoded = false;
 
 		// low nibble of first byte should be 0x08
-		list(, $first_nibble)    = unpack('h', $gzData);
+		list(, $first_nibble) = unpack('h', $gz_data);
 
 		// First 2 bytes should be divisible by 0x1F
-		list(, $first_two_bytes) = unpack('n', $gzData);
+		list(, $first_two_bytes) = unpack('n', $gz_data);
 
-		if (0x08 == $first_nibble && 0 == ($first_two_bytes % 0x1F)) {
+		if ($first_nibble === 0x08 && ($first_two_bytes % 0x1F) === 0) {
 			$huffman_encoded = true;
 		}
 
 		if ($huffman_encoded) {
-			if (false !== ($decompressed = @gzinflate(substr($gzData, 2)))) {
+			$decompressed = @gzinflate(substr($gz_data, 2));
+			if ($decompressed !== false) {
 				return $decompressed;
 			}
 		}
 
-		if ("\x50\x4b\x03\x04" == substr($gzData, 0, 4)) {
+		if (substr($gz_data, 0, 4) === "\x50\x4b\x03\x04") {
 			// ZIP file format header
 			// Offset 6: 2 bytes, General-purpose field
 			// Offset 26: 2 bytes, filename length
 			// Offset 28: 2 bytes, optional field length
 			// Offset 30: Filename field, followed by optional field, followed
 			// immediately by data
-			list(, $general_purpose_flag) = unpack('v', substr($gzData, 6, 2));
+			list(, $general_purpose_flag) = unpack('v', substr($gz_data, 6, 2));
 
 			// If the file has been compressed on the fly, 0x08 bit is set of
 			// the general purpose field. We can use this to differentiate
 			// between a compressed document, and a ZIP file
-			$zip_compressed_on_the_fly = (0x08 == (0x08 & $general_purpose_flag));
+			$zip_compressed_on_the_fly = ((0x08 & $general_purpose_flag) === 0x08);
 
 			if (!$zip_compressed_on_the_fly) {
 				// Don't attempt to decode a compressed zip file
-				return $gzData;
+				return $gz_data;
 			}
 
 			// Determine the first byte of data, based on the above ZIP header
 			// offsets:
-			$first_file_start = array_sum(unpack('v2', substr($gzData, 26, 4)));
-			if (false !== ($decompressed = @gzinflate(substr($gzData, 30 + $first_file_start)))) {
+			$first_file_start = array_sum(unpack('v2', substr($gz_data, 26, 4)));
+			$decompressed     = @gzinflate(substr($gz_data, 30 + $first_file_start));
+			if ($decompressed !== false) {
 				return $decompressed;
 			}
 			return false;
 		}
 
 		// Finally fall back to straight gzinflate
-		if (false !== ($decompressed = @gzinflate($gzData))) {
+		$decompressed = @gzinflate($gz_data);
+		if ($decompressed !== false) {
 			return $decompressed;
 		}
 
 		// Fallback for all above failing, not expected, but included for
 		// debugging and preventing regressions and to track stats
-		if (false !== ($decompressed = @gzinflate(substr($gzData, 2)))) {
+		$decompressed = @gzinflate(substr($gz_data, 2));
+		if ($decompressed !== false) {
 			return $decompressed;
 		}
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index fe6f9b6fb6..e3713c7ac7 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.8-alpha-50841';
+$wp_version = '5.8-alpha-50842';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.