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

该函数将根据参数中的规则生成密码

function random_password( $length = 8, $characters = true, $numbers = true, $case_sensitive = true, $hash = true ) {

    $password = '';

    if($characters)
    {
        $charLength = $length;
        if($numbers) $charLength-=2;
        if($case_sensitive) $charLength-=2;
        if($hash) $charLength-=2;
        $chars = "abcdefghijklmnopqrstuvwxyz";
        $password.= substr( str_shuffle( $chars ), 0, $charLength );
    }

    if($numbers)
    {
        $numbersLength = $length;
        if($characters) $numbersLength-=2;
        if($case_sensitive) $numbersLength-=2;
        if($hash) $numbersLength-=2;
        $chars = "0123456789";
        $password.= substr( str_shuffle( $chars ), 0, $numbersLength );
    }

    if($case_sensitive)
    {
        $UpperCaseLength = $length;
        if($characters) $UpperCaseLength-=2;
        if($numbers) $UpperCaseLength-=2;
        if($hash) $UpperCaseLength-=2;
        $chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
        $password.= substr( str_shuffle( $chars ), 0, $UpperCaseLength );
    }

    if($hash)
    {
        $hashLength = $length;
        if($characters) $hashLength-=2;
        if($numbers) $hashLength-=2;
        if($case_sensitive) $hashLength-=2;
        $chars = "!@#$%^&*()_-=+;:,.?";
        $password.= substr( str_shuffle( $chars ), 0, $hashLength );
    }

    $password = str_shuffle( $password );
    return $password;
}

其他回答

另一个(仅限linux)

function randompassword()
{
    $fp = fopen ("/dev/urandom", 'r');
    if (!$fp) { die ("Can't access /dev/urandom to get random data. Aborting."); }
    $random = fread ($fp, 1024); # 1024 bytes should be enough
    fclose ($fp);
    return trim (base64_encode ( md5 ($random, true)), "=");
}

下面是另一个密码生成器代码片段。 控制长度,数字和特殊字符计数和列表。

其他解决方案的一个问题是,它们没有包含重复字符的选项。而下面的脚本也可以做到这一点。

$length = random_int(30, 40);

$pass = [];

$lowers = range('a', 'z');
$uppers = range('A', 'Z');
$digits = range('0', '9');
$specials = ['.', '-', '_', '^', '#', '(', ')'];

$specialCount = random_int(1, 5);
$digitCount = random_int(1, 9);

for ($i = 0; $i < $length - $specialCount - $digitCount; $i++) { 
    $pass[] = random_int(1, PHP_INT_MAX) % 2 == 0 ? $uppers[array_rand($uppers)] : $lowers[array_rand($lowers)];
}
for ($i = 0; $i < $specialCount; $i++) { 
    $pass[] = $specials[array_rand($specials)];
}
for ($i = 0; $i < $digitCount; $i++) { 
    $pass[] = $digits[array_rand($digits)];
}

shuffle($pass)

$pass = implode('', $pass);

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。

下面是我对随机密码生成助手的看法。

它确保密码包含数字,大写字母和小写字母,以及至少3个特殊字符。

密码长度为11 ~ 30。

function plainPassword(): string
{
    $numbers = array_rand(range(0, 9), rand(3, 9));
    $uppercase = array_rand(array_flip(range('A', 'Z')), rand(2, 8));
    $lowercase = array_rand(array_flip(range('a', 'z')), rand(3, 8));
    $special = array_rand(array_flip(['@', '#', '$', '!', '%', '*', '?', '&']), rand(3, 5));

    $password = array_merge(
        $numbers,
        $uppercase,
        $lowercase,
        $special
    );

    shuffle($password);

    return implode($password);
}

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。