PHP captcha class is not displaying the image

phpuser123

I just read a few tutorials about CAPTCHA from the net..I got the class captcha.php and a main file ..I pasted a few codes from the net but I cannot run the CAPTCHA as expected.The image is not being diaplayed....Instead I am getting the value from the alt in the image tag.

Here are my codes for the main file :

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 <?php session_start() ?>

<html>

<body>

<form method="post" action="">

<table bgcolor="#CCCCCC">

<tr><td><input type="text" name="validator" id="validator" size="4" />

<img src="captcha.php" alt="CAPTCHA image" align="top" /></td></tr>
 
<tr><th align="center"><input type="submit" value="Submit"></th></tr>    

</table>

</form>

<?php

if(isset($_POST["captcha"]))

if (!empty($_POST['validator']) && $_POST['validator'] == $_SESSION['rand_code']) {

    echo "Validated";

    unset($_SESSION['rand_code']);

}

?>

</body>

</html>

I tested the source of the image in the same directory as the captha.php and it works fine.

I will be highly obliged if anyone can help me in this ..Thanks

Markus

Sounds like your captcha.php isn't working as expected. However, without more information (maybe the class code?) we cannot help any further.

phpuser123

my captcha.php is like the following :

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 <?php

session_start();

header("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); 

header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT"); 

header("Cache-Control: no-store, no-cache, must-revalidate"); 

header("Cache-Control: post-check=0, pre-check=0", false);

header("Pragma: no-cache"); 
 
function _generateRandom($length=6)

{

    $_rand_src = array(

        array(48,57) //digits

        , array(97,122) //lowercase chars

//        , array(65,90) //uppercase chars

    );

    srand ((double) microtime() * 1000000);

    $random_string = "";

    for($i=0;$i<$length;$i++){

        $i1=rand(0,sizeof($_rand_src)-1);

        $random_string .= chr(rand($_rand_src[$i1][0],$_rand_src[$i1][1]));

    }

    return $random_string;

}
 
$im = @imagecreatefromjpeg("captcha.jpg"); 

$rand = _generateRandom(3);

$_SESSION['captcha'] = $rand;

ImageString($im, 5, 2, 2, $rand[0]." ".$rand[1]." ".$rand[2]." ", ImageColorAllocate ($im, 0, 0, 0));

$rand = _generateRandom(3);

ImageString($im, 5, 2, 2, " ".$rand[0]." ".$rand[1]." ".$rand[2], ImageColorAllocate ($im, 255, 0, 0));

Header ('Content-type: image/jpeg');

imagejpeg($im,NULL,100);

ImageDestroy($im);

?>

Atli

Hey.

I would guess it has something to do with the imagecreatefrompng function. Try verifying that the image it creates is valid. (Something you should always try to do.)

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 header('Content-type: image/jpeg');

$im = @imagecreatefromjpeg("captcha.jpg");

if($im) {

    // Display the CAPTCHA thing

}

else {

    $_SESSION['captcha'] = false;

    readfile('captcha-error.jpg');

}

Now it will display the captcha-error.jpg image when a real captcha image can not be created. - Could be a error message, or it could even be a standard, temporary captcha that is displayed until you can fix the problem.

P.S.
You may want to check out reCAPTCHA.

PHP captcha class is not displaying the image

re: PHP captcha class is not displaying the image

re: PHP captcha class is not displaying the image

re: PHP captcha class is not displaying the image

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