PHP randomly generates username and random password_PHP tutorial

//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++ )

                                                                 

// Here two character acquisition methods

// The first is to use substr to intercept any character in $chars;

// The second method is to take any element of the character array $chars

// $password .= substr($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);

Excerpted from Hurry’s column

http://www.bkjia.com/PHPjc/478526.html