mirror of
https://github.com/WordPress/WordPress.git
synced 2024-08-25 23:33:22 +02:00
Built from https://develop.svn.wordpress.org/trunk@29382 git-svn-id: http://core.svn.wordpress.org/trunk@29160 1a063a9b-81f0-0310-95a4-ce76da25c4cd
125 lines
3.2 KiB
PHP
125 lines
3.2 KiB
PHP
<?php
|
|
/**
|
|
* WordPress implementation for PHP functions either missing from older PHP versions or not included by default.
|
|
*
|
|
* @package PHP
|
|
* @access private
|
|
*/
|
|
|
|
// If gettext isn't available
|
|
if ( !function_exists('_') ) {
|
|
function _($string) {
|
|
return $string;
|
|
}
|
|
}
|
|
|
|
if ( !function_exists('mb_substr') ):
|
|
function mb_substr( $str, $start, $length=null, $encoding=null ) {
|
|
return _mb_substr($str, $start, $length, $encoding);
|
|
}
|
|
endif;
|
|
|
|
function _mb_substr( $str, $start, $length=null, $encoding=null ) {
|
|
// the solution below, works only for utf-8, so in case of a different
|
|
// charset, just use built-in substr
|
|
$charset = get_option( 'blog_charset' );
|
|
if ( !in_array( $charset, array('utf8', 'utf-8', 'UTF8', 'UTF-8') ) ) {
|
|
return is_null( $length )? substr( $str, $start ) : substr( $str, $start, $length);
|
|
}
|
|
// use the regex unicode support to separate the UTF-8 characters into an array
|
|
preg_match_all( '/./us', $str, $match );
|
|
$chars = is_null( $length )? array_slice( $match[0], $start ) : array_slice( $match[0], $start, $length );
|
|
return implode( '', $chars );
|
|
}
|
|
|
|
if ( !function_exists('hash_hmac') ):
|
|
function hash_hmac($algo, $data, $key, $raw_output = false) {
|
|
return _hash_hmac($algo, $data, $key, $raw_output);
|
|
}
|
|
endif;
|
|
|
|
function _hash_hmac($algo, $data, $key, $raw_output = false) {
|
|
$packs = array('md5' => 'H32', 'sha1' => 'H40');
|
|
|
|
if ( !isset($packs[$algo]) )
|
|
return false;
|
|
|
|
$pack = $packs[$algo];
|
|
|
|
if (strlen($key) > 64)
|
|
$key = pack($pack, $algo($key));
|
|
|
|
$key = str_pad($key, 64, chr(0));
|
|
|
|
$ipad = (substr($key, 0, 64) ^ str_repeat(chr(0x36), 64));
|
|
$opad = (substr($key, 0, 64) ^ str_repeat(chr(0x5C), 64));
|
|
|
|
$hmac = $algo($opad . pack($pack, $algo($ipad . $data)));
|
|
|
|
if ( $raw_output )
|
|
return pack( $pack, $hmac );
|
|
return $hmac;
|
|
}
|
|
|
|
if ( !function_exists('json_encode') ) {
|
|
function json_encode( $string ) {
|
|
global $wp_json;
|
|
|
|
if ( !is_a($wp_json, 'Services_JSON') ) {
|
|
require_once( ABSPATH . WPINC . '/class-json.php' );
|
|
$wp_json = new Services_JSON();
|
|
}
|
|
|
|
return $wp_json->encodeUnsafe( $string );
|
|
}
|
|
}
|
|
|
|
if ( !function_exists('json_decode') ) {
|
|
function json_decode( $string, $assoc_array = false ) {
|
|
global $wp_json;
|
|
|
|
if ( !is_a($wp_json, 'Services_JSON') ) {
|
|
require_once( ABSPATH . WPINC . '/class-json.php' );
|
|
$wp_json = new Services_JSON();
|
|
}
|
|
|
|
$res = $wp_json->decode( $string );
|
|
if ( $assoc_array )
|
|
$res = _json_decode_object_helper( $res );
|
|
return $res;
|
|
}
|
|
function _json_decode_object_helper($data) {
|
|
if ( is_object($data) )
|
|
$data = get_object_vars($data);
|
|
return is_array($data) ? array_map(__FUNCTION__, $data) : $data;
|
|
}
|
|
}
|
|
|
|
if ( ! function_exists( 'hash_equals' ) ) :
|
|
/**
|
|
* Compare two strings in constant time.
|
|
*
|
|
* This function was added in PHP 5.6.
|
|
* It can leak the length of a string.
|
|
*
|
|
* @since 3.9.2
|
|
*
|
|
* @param string $a Expected string.
|
|
* @param string $b Actual string.
|
|
* @return bool Whether strings are equal.
|
|
*/
|
|
function hash_equals( $a, $b ) {
|
|
$a_length = strlen( $a );
|
|
if ( $a_length !== strlen( $b ) ) {
|
|
return false;
|
|
}
|
|
$result = 0;
|
|
|
|
// Do not attempt to "optimize" this.
|
|
for ( $i = 0; $i < $a_length; $i++ ) {
|
|
$result |= ord( $a[ $i ] ) ^ ord( $b[ $i ] );
|
|
}
|
|
|
|
return $result === 0;
|
|
}
|
|
endif; |