簡短生成隨機密碼支援特殊字符

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;