Summary of some methods for generating random passwords in PHP_PHP Tutorial

When you want to generate a random password, your first thought may be to use the uniquid() function, but if we use array_rand() and range(), we can achieve this function more perfectly.

Method 1,

The code is as follows

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代码如下	复制代码
header("Content-type: text/html; charset=utf-8"); function randCode($length) { $ranges = array(range('a', 'z'), range('A', 'Z'), range(1, 9)); $code = ''; for($i = 0; $i < $length; $i++){ $rkey = array_rand($ranges); $vkey = array_rand($ranges[$rkey]); $code .= $ranges[$rkey][$vkey]; } return $code; } echo "www.bKjia.c0m"; echo randCode(5); // 输出如：3IxY8、E6HOv、1qHiy等等 ?>

header("Content-type: text/html; charset=utf-8");

function randCode($length) {

$ranges = array(range('a', 'z'), range('A', 'Z'), range(1, 9));

$code = '';

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

          $rkey = array_rand($ranges);

          $vkey = array_rand($ranges[$rkey]);

           $code .= $ranges[$rkey][$vkey];

}

代码如下	复制代码
function create_password($pw_length = 8) { $randpwd = ''; for ($i = 0; $i < $pw_length; $i++) { $randpwd .= chr(mt_rand(33, 126)); } return $randpwd; } // 调用该函数，传递长度参数$pw_length = 6 echo create_password(6);

Return $code;<🎜> }<🎜> <🎜>echo "www.bKjia.c0m";<🎜> echo randCode(5); // Output such as: 3IxY8, E6HOv, 1qHiy, etc.<🎜> ?>

Method 2, 1. Generate a random integer from 33 – 126, such as 35, 2. Convert 35 into the corresponding ASCII code character, such as 35 corresponding to # 3. Repeat the above steps 1 and 2 n times to connect into an n-digit password This algorithm mainly uses two functions. The mt_rand (int $min, int $max) function is used to generate random integers, where $min – $max is the range of ASCII codes. Here it is 33-126, which can be used as needed. Adjustment range, for example, 97 – 122 bits in the ASCII code table correspond to the English letters a – z. For details, please refer to the ASCII code table; chr (int $ascii) function is used to convert the corresponding integer $ascii into the corresponding character.

The code is as follows	Copy code
function create_password($pw_length = 8) { $randpwd = ''; for ($i = 0; $i < $pw_length; $i++)<🎜> <🎜>{<🎜> <🎜>$randpwd .= chr(mt_rand(33, 126));<🎜> <🎜>}<🎜> <🎜>return $randpwd;<🎜> <🎜>}<🎜> <🎜>// Call this function and pass the length parameter $pw_length = 6<🎜> <🎜>echo create_password(6);<🎜>

Method three,

The code is as follows

代码如下

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//自动为用户随机生成用户名(长度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 ) { // 密码字符集，可任意添加你需要的字符 $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()-_ []{}<>~`+=,.;:/?|';             $password = '';             for ( $i = 0; $i < $length; $i++ ) { // 这里提供两种字符获取方式 // 第一种是使用substr 截取$chars中的任意一位字符； // 第二种是取字符数组$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; } // 调用该函数 $userId = 'user'.generate_username(6); $pwd = create_password(9);

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//Automatically generate a random username for the user (length 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 ) {

// Password character set, you can add any characters you need

                   $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()-_ []{}<>~`+=,.;:/?|'; $password = ''; for ( $i = 0; $i < $length; $i++ )                     {                                                                                                                                                                                                        // There are two ways to obtain characters here                                                                                                                                                                                                                              // The first is to use substr to intercept any character in $chars; // The second is the arbitrary element of the character array $ char                                 // $password .= substr($chars, mt_rand(0, strlen($chars) - 1), 1); $password .= $chars[ mt_rand(0, strlen($chars) - 1) ];          }              return $password; } // Call this function $userId = 'user'.generate_username(6); $pwd = create_password(9); http://www.bkjia.com/PHPjc/628618.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/628618.htmlTechArticleWhen you want to generate a random password, your first thought may be to use the uniquid() function. But if we use array_rand() and range(), we can achieve this more perfectly...