Question

如何使用至少一个字母，一个数字和一个特殊字符创建一个密码，并使用PHP中的正则表达式将字符串的最小长度设为8

Answer 1

正则表达式对于匹配字符串很有用，而不是创建它们。

您可以使用此代码生成符合您要求的密码：

<?php
// Generate a password of length = Max(8, $len)
function generatePassword($len)
{
    $lower = array('a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z');
    $upper = array('A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z');
    $specials = array('!','"','#','$','%','&','\'','(',')','*','+',',','-','.','/',':',';','<','=','>','?','@','[','\\',']','^','_','`','{','|','}','~');
    $digits = array('0','1','2','3','4','5','6','7','8','9');
    $all = array($lower, $upper, $specials, $digits);

    $pwd = $lower[array_rand($lower, 1)];
    $pwd = $pwd . $upper[array_rand($upper, 1)];
    $pwd = $pwd . $specials[array_rand($specials, 1)];
    $pwd = $pwd . $digits[array_rand($digits, 1)];

    for($i = strlen($pwd); $i < max(8, $len); $i++)
    {
        $temp = $all[array_rand($all, 1)];
        $pwd = $pwd . $temp[array_rand($temp, 1)];
    }
    return str_shuffle($pwd);
}

echo generatePassword(8);

See it live

生成满足php中正则表达式的动态密码

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