function user_password

Generate a random alphanumeric password.

File

modules/user.module, line 283

Enables the user registration and login system.

Code

function user_password($length = 10) {

  // This variable contains the list of allowable characters for the
  // password.  Note that the number 0 and the letter 'O' have been
  // removed to avoid confusion between the two.  The same is true
  // of 'I' and 1.
  $allowable_characters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23456789';

  // We see how many characters are in the allowable list:
  $len = strlen($allowable_characters);

  // Seed the random number generator with the microtime stamp.
  mt_srand((double) microtime() * 1000000);

  // Declare the password as a blank string.
  $pass = '';

  // Loop the number of times specified by $length.
  for ($i = 0; $i < $length; $i++) {

    // Each iteration, pick a random character from the
    // allowable string and append it to the password:
    $pass .= $allowable_characters[mt_rand(0, $len - 1)];
  }
  return $pass;
}