每本护照必须随机包含符号，大写字母，小写字母，数字。不起作用

Question

随机密码生成方法必须在每个生成的字符串上包含

a）符号b）大写字母c）小写字母d）数字。

但是我的输出会随机丢失所有这些。

function randomPassword() {
    $alphabet = "abcdefghijklmnopqrstuwxyzABCDEFGHIJKLMNOPQRSTUWXYZ0123456789$_.@!^%&*()-#";
    $pass = array(); //remember to declare $pass as an array
    $alphaLength = strlen($alphabet) - 1; //put the length -1 in cache
    for ($i = 0; $i < 8; $i++) {
      $n = rand(0, $alphaLength);
      $pass[] = $alphabet[$n];
    }
    return implode($pass); //turn the array into a string
}

echo randomPassword();

Answer 1

修改您的方法并添加必需的符号明确地：

function randomPassword() {
    $letter = "abcdefghijklmnopqrstuwxyz";
    $upperLetters = "ABCDEFGHIJKLMNOPQRSTUWXYZ";
    $numbers = "0123456789";
    $signs = '$_.@!^%&*()-#';
    $pass = array(); //remember to declare $pass as an array

    // add a letter
    $pass[] = $letters[rand(0, strlen($letters) - 1)];
    // add an uppercase letter
    $pass[] = $letters[rand(0, strlen($upperLetters) - 1)];
    // add number and sign    
    $pass[] = $letters[rand(0, strlen($numbers) - 1)];
    $pass[] = $letters[rand(0, strlen($signs) - 1)];

    // add more chars
    $alphabet = $letters . $upperLetters . $numbers . $signs;
    for ($i = 0; $i < $yourLength; $i++) {
        $n = rand(0, strlen($alphabet) - 1);
        $pass[] = $alphabet[$n];
    }

    // shuffle chars in array so your passwords not always start with letter
    shuffle($pass);
    return implode($pass); //turn the array into a string
}

echo randomPassword();

进一步：

function randomPassword() {
    $alphabet = "abcdefghijklmnopqrstuwxyzABCDEFGHIJKLMNOPQRSTUWXYZ0123456789$_.@!^%&*()-#";
    $pass = array(); //remember to declare $pass as an array

    // numbers here are start and end positions of symbols groups
    $pass[] = $alphabet[rand(0, 25)];
    $pass[] = $alphabet[rand(26, 51)];
    $pass[] = $alphabet[rand(52, 61)];
    $pass[] = $alphabet[rand(62, 74)];

    $alphaLength = strlen($alphabet) - 1; //put the length -1 in cache
    for ($i = 0; $i < $yourLength; $i++) {
      $n = rand(0, $alphaLength);
      $pass[] = $alphabet[$n];
    }

    shuffle($pass);
    return implode($pass); //turn the array into a string
}

echo randomPassword();

Answer 2

我认为这会有所帮助

<?php
function random_password_generate($length) {
    $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()-=+?";
    $password = substr(str_shuffle( $chars ),0, $length );
    return $password;
}

$password = random_password_generate(8);
echo $password;
?>