PHP随机生成n位字符串
<?php//随机生成n位字符串
functionrand_str($num){
$str = "qwertyuioplkjhgfdsazxcvbnmQAZWSXEDCRFVTGBYHNUJMIKOLP1234567890";
$str_len = strlen($str)-1;
//echo $str_len;
$s='';
for($i = 0; $i < $num; $i++) {
$s.=$str[rand(0, $str_len)];
}
echo$s;
}
rand_str(32);
?>
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