WordPressを読む 9 /blog/wp-includes/compat.php 完了
2014/11/28
/blog/wp-includes/compat.php
読込元 : /blog/wp-settings.php
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | <?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; } } |
関数
function_exists() 指定した関数が定義されている場合に TRUE を返す
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | 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( '', $chars ); } |
関数
_mb_substr()
mb_substr()
組み込み関数mb_substr()を置き換える
設定（DBに設定済）の文字コードのゆれを吸収し、mb_substr()を実行する。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | if ( !function_exists('hash_hmac') ): function hash_hmac($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; } |
関数
_hash_hmac()
hash_hmac()を置き換える
hash_hmac() HMAC 方式を使用してハッシュ値を生成する
あまり関係がないようだ。
1 2 3 4 5 6 7 8 9 10 | 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 ); } } |
読込むファイル
/blog/wp-includes/class-json.php
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | 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; } } |
読込むファイル
/blog/wp-includes/class-json.php
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | 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; |
PHP5.6から使えるようになる関数