织梦DedeCMS关键词怎么替换

//高亮专用, 替换多次是可能不能达到最多次 function _highlight($string, $words, $result, $pre) {     global $cfg_replace_num;     $string = str_replace('"', '"', $string);     uasort($words,create_function('$a, $b','return strlen($a)>strlen($b);'));