将html Special Entities (&#开头)转成utf-8编码

preg_replace_callback 简单範例

$S = "増 我 増 増 増  墑 増 墑 ";echo $S = preg_replace_callback(    '/&#(\d+);/i',    function ($matches) {         return mb_convert_encoding($matches[0], 'UTF-8', 'HTML-ENTITIES');    },    $S);``