captcha not working in ie

[r-it]

I have a problem with my captcha script, the thing is it's showing in firefox, bt i obv. had to test it for ie(since most end users use this useless browser), and it doesnt show my captcha, i have to right click for it to show, has anyone else ever experienced this problem before, or do i have to post my code for someone to be able to help me, oh well what the heck i'll post it now

<?php
  ob_start();

  //Start the session
  session_start();

  //Load the Class
  require('./captcha.class.php');

  //Create a CAPTCHA
  $captcha = new captcha();

  //Store the String in a session
  $_SESSION['CAPTCHAString'] = $captcha->GetCaptchaString();

?>

CAPTCHA CLASS

<?php

  class captcha
  {

    var $Length;
    var $CaptchaString;
    var $ImageType;
    var $Font;
    var $CharWidth;

    function captcha ($length = 6, $type = 'png', $letter = '')
    {

      $this->Length    = $length;
      $this->ImageType = $type;
      $this->Font      = './hurryup.TTF';
      $this->CharWidth = 19;

      if ($letter == '')
      {

        $this->StringGen();

      }
      else
      {

        $this->Length        = strlen($letter);
        $this->CaptchaString = $letter;

      }

      $this->SendHeader();

      $this->MakeCaptcha();

    }

    function StringGen ()
    {

      $uppercase  = range('A', 'Z');
      $numeric    = range(0, 9);

      $CharPool   = array_merge($uppercase, $numeric);
      $PoolLength = count($CharPool) - 1;

      for ($i = 0; $i < $this->Length; $i++)
      {

        $this->CaptchaString .= $CharPool[mt_rand(0, $PoolLength)];

      }

    }

    function SendHeader ()
    {

      switch ($this->ImageType)
      {

        case 'jpeg': header('Content-type: image/jpeg'); break;
        case 'png':  header('Content-type: image/png');  break;
        default:     header('Content-type: image/png');  break;

      }

    }

    function MakeCaptcha ()
    {

      $imagelength = $this->Length * $this->CharWidth + 16;
      $imageheight = 35;

      $image       = imagecreate($imagelength, $imageheight);

      $bgcolor     = imagecolorallocate($image, 222, 222, 222);

      $stringcolor = imagecolorallocate($image, 0, 0, 0);
      $linecolor   = imagecolorallocate($image, 0, 0, 0);

      imagettftext($image, 25, 0, 8, 22,
                   $stringcolor,
                   $this->Font,
                   $this->CaptchaString);

      switch ($this->ImageType)
      {

        case 'jpeg': imagejpeg($image); break;
        case 'png':  imagepng($image);  break;
        default:     imagepng($image);  break;

      }

    }

    function GetCaptchaString ()
    {

      return $this->CaptchaString;

    }

  }

?>

AND HERES MY CODE TO USE IT

$form = "<img src=\"./captcha.php\" alt=\"Security code\" />";

and they're all in the same directory

[soycharliente]

I recommend against using image CAPTCHAs. My company recently asked my to research the Section 508 standards. I found some interesting information that showed the results of studies done. In 1998, 7-10% of people that had some type of disability used the internet. In 2001, that number increased to ~38%. It doesn't seem like a lot, but you can accomplish the same concept with a simple text input.

 

Just giving my $0.02 (no disrespect).

 

I was using an image CAPTCHA on my site but replaced it with a text input. My code didn't look like yours at all, but if you're interested in looking at it, PM me and I'll try to dig it up.