TalkPHP - eval remake

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- - eval remake (http://www.talkphp.com/tips-tricks/2667-eval-remake.html)

TlcAndres

04-20-2008 09:54 PM

eval remake

A bit of a challenge to storm up the head I suppose.

PHP Code:


		
			
<?php



 rep_eval('

     $i = 0;

      for($v = $i;$v < 100;++$v){

       echo($v);

      }

');

?>

Basically is to get this code or any other php code to run WITHOUT using eval() or any built in php functions to run php code (though I think eval() is the only one);

sjaq	04-21-2008 06:13 AM

PHP Code:


		
			
<?php 

    function rep_eval($str) {
        $f = fopen('./tmp.php', 'w');
        fwrite($f, '<?php '. $str . ' ?>');
        fclose($f);
        
        require './tmp.php';
        
        unlink('./tmp.php');
    }

    rep_eval('
         $i = 0;
        for($v = $i;$v < 100;++$v){ 
           echo($v); 
        }
    ');
    
?>

Kalle

05-23-2008 10:41 AM

If not using sjag's example by temp files then the only thing I really can think of is to use the tokenizer extension for PHP and then make your own executor which could be big ;)

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