php 正则只保留 汉字 字母 数字
- PHP中文网Original
- 2016-05-22 18:27:011359browse
$str = "?><M<>\"s~!@#$%^&*()+_)(*&dsdffsde~！@#￥%……&*5545445（）+——）（*&……%￥#@！~ 电影_后天 230809-peopl.e die我d.(*&^%$#@!!~";
echo match_chinese($str);
function match_chinese($chars,$encoding='utf8')
{
$pattern =($encoding=='utf8')?'/[\x{4e00}-\x{9fa5}a-zA-Z0-9]/u':'/[\x80-\xFF]/';
preg_match_all($pattern,$chars,$result);
$temp =join('',$result[0]);
return $temp;
}
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