php隨機密碼生成的自定義函數(shù)

2024-09-04 11:49:12

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供稿：網(wǎng)友

如果要做到安全密碼與用戶名都隨機我有一個朋友做服務(wù)器的登錄密碼與用戶名就是使用了phpmyadmin隨機生成密碼功能來做的,與其用phpmyadmin不如自己做了,下文整理了一些關(guān)于php隨機密碼生成的自定義函數(shù)供大家參考.

可以指定生成的字符串長度,代碼如下:

function rand_str($length, $max=FALSE)

{

  if (is_int($max) && $max > $length)

  {

    $length = mt_rand($length, $max);

  }

  $output = '';



  for ($i=0; $i<$length; $i++)

  {

    $which = mt_rand(0,2);



    if ($which === 0)

    {

      $output .= mt_rand(0,9);

    }

    elseif ($which === 1)

    {

      $output .= chr(mt_rand(65,90));

    }

    else

    {

      $output .= chr(mt_rand(97,122));

    }

  }

  return $output;

}

調(diào)用實例:$randstr = rand_str(16);

生成隨機字符串的函數(shù),代碼如下:

<?php

/**

* 產(chǎn)生隨機字符串

*

* 產(chǎn)生一個指定長度的隨機字符串,并返回給用戶

*

* @access public

* @param int $len 產(chǎn)生字符串的位數(shù)

* @return string

*/

function randStr($len=6) {

$chars='ABDEFGHJKLMNPQRSTVWXYabdefghijkmnpqrstvwxy23456789#%*'; // characters to build the password from

mt_srand((double)microtime()*1000000*getmypid()); // seed the random number generater (must be done)

$password='';//開源軟件:Vevb.com

while(strlen($password)<$len)

$password.=substr($chars,(mt_rand()%strlen($chars)),1);

return $password;

}

?>

創(chuàng)建字符池.

function randomkeys($length)

   {

       $pattern = '1234567890abcdefghijklmnopqrstuvwxyz

                   ABCDEFGHIJKLOMNOPQRSTUVWXYZ,./&l

                  t;>?;#:@~[]{}-_=+)(*&^%$?!';    //字符池

      for($i=0; $i<$length; $i++)

       {

           $key .= $pattern{mt_rand(0,35)};    //生成php隨機數(shù)

       }

       return $key;

   }

   echo randomkeys(8);

無需創(chuàng)建字符池

function randomkeys($length)

   {

        $output='';

        for ($a = 0; $a < $length; $a++) {

            $output .= chr(mt_rand(35, 126));    //生成php隨機數(shù)

        }

        return $output;

    }

    echo randomkeys(8);

隨機用戶名和隨機密碼例子:

//隨機生成用戶名(長度6-13)

function create_password($pw_length = 4){

    $randpwd = '';

    for ($i = 0; $i < $pw_length; $i++){

        $randpwd .= chr(mt_rand(33, 126));

    }

    return $randpwd;

}

function generate_username( $length = 6 ) {

    // 密碼字符集，可任意添加你需要的字符

    $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()-_ []{}<>~`+=,.;:/?|';

    $password = '';

    for ( $i = 0; $i < $length; $i++ )

    {

        // 這里提供兩種字符獲取方式

        // 第一種是使用substr 截取$chars中的任意一位字符；

        // 第二種是取字符數(shù)組$chars 的任意元素

        // $password .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);

        $password .= $chars[ mt_rand(0, strlen($chars) - 1) ];

    }

    return $password;

}

//調(diào)用

$userId = 'user'.generate_username(6);

$pwd = create_password(9);

mt_srand生成隨機種子,密碼的長度可以隨意定義,最長32位.

<?php

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

function gen_random_password($password_length = 32, $generated_password = ""){

$valid_characters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";

$chars_length = strlen($valid_characters) - 1;

for($i = $password_length; $i--; ) {

  //$generated_password .= $valid_characters[mt_rand(0, $chars_length)];

  $generated_password .= substr($valid_characters, (mt_rand()%(strlen($valid_characters))), 1);

}

return $generated_password;

}

?>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<title>php密碼生成器</title>

<style type="text/css">

body {

font-family: Arial;

font-size: 10pt;

}

</style>

</head>

<body>

<span style="font-weight: bold; font-size: 15pt;">密碼生成器</span><br /><br />

<?php

if (isset($_GET['password_length'])){

if(preg_match("/([0-9]{1,8})/", $_GET['password_length'])){

  print("密碼生成成功:<br />

<span style="font-weight: bold">" . gen_random_password($_GET['password_length']) . "</span><br /><br />n");

} else {

  print("密碼長度不正確!<br /><br />n");

}  //開源軟件:Vevb.com

}

print <<< end

請為密碼生成其指定生成密碼的長度:<br /><br />

<form action="{$_SERVER['PHP_SELF']}" method="get">

<input type="text" name="password_length">

<input type="submit" value="生成">

</form>

end;

?>

</body>

</html>