This is not exactly a "Number Used Once". Neither a number Nor can be Just Used Once. But can Reduce the Repitive Attachs by Decreasing the Window of attach

To apply to your project

1. include the class in all your file that needs to generate nonce or verify nonce. Eg.

   <?php include(PATH TO ar_nonce.class.php ); ?>

2. Then create new instance of class

   <?php $nonce=new ar_Nonce();  ?>

3. To attach a nonce we have 3 methods.
   1. To attach in Form :

      <?php echo $nonce->generate_form_nonce(string $action , [ string $user ] , [ bool $output=false ]); ?>

   2. To attach in Url :

      <?php echo $nonce->generate_url_nonce( string $action,[ string $user],[bool $out=false ]); ?> 

   3. To other purposes :

      <?php echo $nonce->generate( string $action ,[string $user] , [ int $timeoutSeconds , [ string $secretKey ]); ?> 

4. To verify a nonce :

   <?php $nonce->check(string $nonce , string $action , [ string $user ], [ string $secret]) ?>