我试图在php中生成一个随机密码。

但是我得到的都是'a'返回类型是数组类型,我希望它是字符串。对如何修改代码有什么想法吗?

谢谢。

function randomPassword() {
    $alphabet = "abcdefghijklmnopqrstuwxyzABCDEFGHIJKLMNOPQRSTUWXYZ0123456789";
    for ($i = 0; $i < 8; $i++) {
        $n = rand(0, count($alphabet)-1);
        $pass[$i] = $alphabet[$n];
    }
    return $pass;
}

当前回答

你最好的选择是ircmaxell的RandomLib库。

使用的例子:

$factory = new RandomLib\Factory;
$generator = $factory->getGenerator(new SecurityLib\Strength(SecurityLib\Strength::MEDIUM));

$passwordLength = 8; // Or more
$randomPassword = $generator->generateString($passwordLength);

它产生的字符串比普通的随机函数(如shuffle()和rand()(这是你通常想要的敏感信息,如密码,盐和密钥)更强的随机性。

其他回答

使用这个简单的代码生成med-strong密码长度为12

$password_string = '!@#$%*&abcdefghijklmnpqrstuwxyzABCDEFGHJKLMNPQRSTUWXYZ23456789';
$password = substr(str_shuffle($password_string), 0, 12);

Generates a strong password of length 8 containing at least one lower case letter, one uppercase letter, one digit, and one special character. You can change the length in the code too. function checkForCharacterCondition($string) { return (bool) preg_match('/(?=.*([A-Z]))(?=.*([a-z]))(?=.*([0-9]))(?=.*([~`\!@#\$%\^&\*\(\)_\{\}\[\]]))/', $string); } $j = 1; function generate_pass() { global $j; $allowedCharacters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ~`!@#$%^&*()_{}[]'; $pass = ''; $length = 8; $max = mb_strlen($allowedCharacters, '8bit') - 1; for ($i = 0; $i < $length; ++$i) { $pass .= $allowedCharacters[random_int(0, $max)]; } if (checkForCharacterCondition($pass)){ return '<br><strong>Selected password: </strong>'.$pass; }else{ echo 'Iteration '.$j.': <strong>'.$pass.'</strong> Rejected<br>'; $j++; return generate_pass(); } } echo generate_pass();

这是我的密码助手

class PasswordHelper
{
    /**
    * generate a secured random password
    */
    public static function generatePassword(
        int $lowerCaseCount=8, 
        int $upperCaseCount=8, 
        int $numberCount=8, 
        int $specialCount=4
    ): string
    {
        $lowerCase  = 'abcdefghijklmnopqrstuvwxyz';
        $upperCase  = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
        $number     = '0123456789';
        $special    = '!@#$%^&*';

        $password = self::getRandom($lowerCase, $lowerCaseCount);
        $password .= self::getRandom($upperCase, $upperCaseCount);
        $password .= self::getRandom($number, $numberCount);
        $password .= self::getRandom($special, $specialCount);

        return str_shuffle($password);
    }

    /**
     * get a random string from a set of characters
     */
    public static function getRandom($set, $length): string
    {
        $rand = '';
        $setLength = strlen($set);

        for ($i = 0; $i < $length; $i++)
        {
            $rand .= $set[random_int(0, $setLength - 1)];
        }

        return $rand;
    }
}

用法:

PasswordHelper::generatePassword()或PasswordHelper::generatePassword(2,4,5,3)

2行的小代码。

演示:http://codepad.org/5rHMHwnH

function rand_string( $length ) {

    $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
    return substr(str_shuffle($chars),0,$length);

}

echo rand_string(8);

使用rand_string,您可以定义将创建多少字符。

function password_generate($n, $l, $s) 
{
  $numbers = '1234567890';
  $letters = '1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZabcefghijklmnopqrstuvwxyz';
  $special = '--!=!@@#++%';
  return substr(str_shuffle($numbers), 0, $n).substr(str_shuffle($letters), 0, $l).substr(str_shuffle($special), 0, $s);
}

echo password_generate(2,9,1);