PHP strong random password generator

Webmaster often needs to generate random password for new users. There are many way to do this but I found a very simple method which can generate strong password of any length. This method is based on str_shuffle() function which randomly shuffles a string.

  <?
  function generate_password( $length = 8 ) {
  $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()_-=+;:,.?";
  $password = substr( str_shuffle( $chars ), 0, $length );
  return $password;
  }
  ?>

To generate random password simply pass the desired length of password in this function. If you omit length parameter then it will generate 8 character long password by default.

 $password1 = generate_password(); // default length 8
 $password2 = generate_password(6); // 6 character long password

Liked It? Get Free updates in your Email

Delivered by feedburner

One thought on “PHP strong random password generator

  1. Noxprime
    #

    Great !!
    We can improve by adding the choice of the complexity of the password with this little trick.

    function generate_password($length = 8, $complex=3) {
    $min = "abcdefghijklmnopqrstuvwxyz";
    $num = "0123456789";
    $maj = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    $symb = "!@#$%^&*()_-=+;:,.?";
    $chars = $min;
    if ($complex >= 2) { $chars .= $num; }
    if ($complex >= 3) { $chars .= $maj; }
    if ($complex >= 4) { $chars .= $symb; }
    $password = substr( str_shuffle( $chars ), 0, $length );
    return $password;
    }
    echo generate_password(8);

    Reply

Leave a Reply

Your email address will not be published. Required fields are marked *