简短生成随机密码支持特殊字符

function rand_word($num=12){$re='';$list="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ~0123456789#$%^&";$list=str_split($list);$key=array_rand($list,$num);foreach($key as $value){$re .= $list[$value];}return $re;}