| <?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; |
| } |
| } |