HTTP: Call `mbstring_binary_safe_encoding()` before making a request with Requests to avoid issues with `mbstring.func_overload`.

Props SergeyBiryukov.
Merges [38894] to the 4.6 branch.
Fixes #38226.

Built from https://develop.svn.wordpress.org/branches/4.6@38895


git-svn-id: http://core.svn.wordpress.org/branches/4.6@38838 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-http.php

@@ -363,6 +363,9 @@ class WP_Http {
 			}
 		}
 
+		// Avoid issues where mbstring.func_overload is enabled
+		mbstring_binary_safe_encoding();
+
 		try {
 			$requests_response = Requests::request( $url, $headers, $data, $type, $options );
 
@@ -377,6 +380,8 @@ class WP_Http {
 			$response = new WP_Error( 'http_request_failed', $e->getMessage() );
 		}
 
+		reset_mbstring_encoding();
+
 		/**
 		 * Fires after an HTTP API response is received and before the response is returned.
 		 *

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.6.2-alpha-38728';
+$wp_version = '4.6.2-alpha-38895';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.