Stuff

<?php class vcode_engine{  function generate_code(){    if (empty($_SESSION['validation_image'])){       $code="";       //set up code and validation         $letter = range( 'A', 'Z' );       $numbers = range( '0', '9' );       $all = array_merge( $letter, $numbers );       for ( $counter1 = 0; $counter1 < 6; $counter1++ ) {       shuffle( $all );       $random = rand( 0, 35 );       // generate code       $code = $code.' '.$all[$random];              }        return $code;    }else{        session_unset($_SESSION['validation_image']);    } }  function image_validation(){    $vcode = $this -> generate_code();    #require('conf_system.php');      $_SESSION['validation_image']=str_replace(" ","",$vcode);    $im = imagecreate(130, 30);    // white background and blue text    $bg = imagecolorallocate($im, 255, 255, 255);    $textcolor = imagecolorallocate($im, 0, 0, 0);    // write the string at the top left    imagettftext($im, 12, 0, 20, 27, $textcolor, "libs/vcode/font/mdlabs.ttf", $vcode);    // output the image    #header("Content-type: image/jpg");    imagejpeg ($im, "libs/vcode/images/verify.jpg");    imagedestroy($im);        echo "<img src=\"libs/vcode/images/verify.jpg\" alt=\"verification image\">";  }}