php 自定生成随机密码函数

代码如下:

/ *

用法：$ new_password = return_password（）;

示例：生成密码：2X5bjj2z，ERgid62Y，p2sHtDPv

* /

function return_password () {

// set password length

$pw_length = 8;

// set ASCII range for random character generation

$low_ascii_bound = 50; // "2"

$upper_ascii_bound = 122; // "z"

//开源代码phpfensi.com

// Exclude special characters and some confusing alphanumerics

排除一些特殊字符和字母数字混淆

// o,O,0,I,1,l etc

$notuse = array (58,59,60,61,62,63,64,73,79,91,92,93,94,95,96,108,111);

while ($i < $pw_length) {

mt_srand ((double)microtime() * 1000000);

// random limits within ASCII table

$randnum = mt_rand ($low_ascii_bound, $top_ascii_bound);

if (!in_array ($randnum, $notuse)) {

$password = $password . chr($randnum);

$i++;

}

}

return $password;

}