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Editorial Team
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Asked: 2026-05-24T14:04:31+00:00

I’m using securimage to generate captchas. (http://www.phpcaptcha.org/) I have the following code to verify

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I’m using securimage to generate captchas. (http://www.phpcaptcha.org/)

I have the following code to verify a captcha:

<?php
session_start();

include_once('./securimage.php');
$securimage = new Securimage();

echo "Entered: ".$_GET['captcha']."<br>\n";

if($securimage->check($_GET['captcha'])==false){
  echo "captcha invalid";
}else{
  echo "OK";
}
?>

The problem is, when I visit the url (http://109.123.109.205/lib/securimage/verify.php?captcha=z6fega), it keeps returning “captcha invalid”!

Here is the captcha image url: http://109.123.109.205/lib/securimage/securimage_show.php

I hope someone can help.

Many thanks in advance,

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1 Answer

  1. Editorial Team

    Could be a session_start() problem, can you change to var_dump(session_start()); to make sure it’s working?

    Otherwise I’d be surprised if there was a problem with the library, but there’s little else that could be wrong.

    Update

    I think you need to actually create a page that uses securimage_show.php in an img tag, and call session_start(); at the top.

    Ie.

    <?php session_start(); ?>

<html>
<head><title>Captcha check</title></head>
<body>
<img src="securimage_show.php" />
<form method="get" action="verify.php">
<input type="text" name="captcha" />
<input type="submit" value="Verfiy" />
</form>
</body>
</html>
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