PHP将字符串转为HTML实体引用
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class HtmlEncode { static $_convertToHtmlEntitiesSrcEncoding='UTF-8'; public static function encode($s,$srcEncoding='UTF-8') { self::$_convertToHtmlEntitiesSrcEncoding=$srcEncoding; return preg_replace_callback('|[^\x00-\x7F]+|',array(__CLASS__,'_convertToHtmlEntities'),$s); } public static function _convertToHtmlEntities($data) { if (is_array($data)) { $chars=str_split(iconv(self::$_convertToHtmlEntitiesSrcEncoding,"UCS-2BE",$data[0]),2); $chars=array_map(array(__CLASS__,__FUNCTION__),$chars); return join("",$chars); } else { $code=hexdec(sprintf("%02s%02s;",dechex(ord($data {0})),dechex(ord($data {1})))); return sprintf("&#%s;",$code); } } }