Comments on: A better token algorithm with PHP

By: Dino Zoff

Dino Zoff — Sat, 10 Dec 2011 23:45:17 +0000

@pmb: FAIL.

By: Mike

Mike — Tue, 22 Nov 2011 21:41:49 +0000

rand_alphanumeric is not a PHP function, it's a custom function:


// return random alphanumeric char
function rand_alphanumeric() {
    $subsets[0] = array('min' => 48, 'max' => 57); // ascii digits
    $subsets[1] = array('min' => 65, 'max' => 90); // ascii lowercase English letters
    $subsets[2] = array('min' => 97, 'max' => 122); // ascii uppercase English letters
   
    // random choice between lowercase, uppercase, and digits
    $s = rand(0, 2);
    $ascii_code = rand($subsets[$s]['min'], $subsets[$s]['max']);
   
    return chr( $ascii_code );
}

So if this is in a class you will probably want to call it with something like $this->rand_alphanumeric().

By: Johan

Johan — Thu, 22 Jul 2010 07:41:11 +0000

pmb – “PHP Fatal error: Call to undefined function rand_alphanumeric()

FAIL.”

its from maxims example.

By: Arnold Daniels

Arnold Daniels — Sat, 01 May 2010 11:39:14 +0000

Pmb: You didn’t copy the code from Maxim Chernyak.

By: pmb

pmb — Sat, 01 May 2010 02:44:56 +0000

PHP Fatal error: Call to undefined function rand_alphanumeric()

FAIL.

By: André Liechti

André Liechti — Sat, 26 Apr 2008 14:19:03 +0000

A secure token grid authentication PHP class Hello, I finally decided to clean and distribute to the community a token grid class in PHP. You can have a look on it on the PHPclasses.org repository, licensed in LGPL. You can produce a credit card sized printed token grid for each customer, and then each time they want to log in, we ask (in addition to the username and the password) the token at a specific position. Each token (by default 10x10 on one card) are calculated using an application id, a user id and the position in the grid. The token generation is based on a md5 of the parameters (you can have a look in the source code) Best regards, have a nice week-end. Any feedback welcome! André