php怎么实现正则替换特殊符号

gb2312：if(!preg_match("/^[".chr(0xa1)."-".chr(0xff)."]+$/",$str)) utf-8 ：if(!preg_match("/^[\x{4e00}-\x{9fa5}]+$/u",$str))

$regex = "/(\/|\~|\!|\@|\#|\\$|\%|\^|\&|\*|\(|\)|\_|\+|\{|\}|\:|\<|\>|\?|\[|\]|\,|\.|\/|\;|\'|\`|\-|\=|\\|\||\"){2,}/"; $other = preg_replace($regex,"",$other); $regex = "/(，|。|！|；|：|、|’|‘|【|】|《|》|？|@|#|￥|%|&|\*|（|）|\-|\+|\=|@|…){2,}/"; $other = preg_replace($regex,"",$other);