Captcha problem users just refresh and it will let them auto submit again

Posted on 16th Feb 2014 07:03 pm by admin

Users will just re submit and not have to enter the new captcha.. ? Lol but if i refresh the page, the captcha auto makes a new1 so u cant submit.

But if u enter captcha code alrdy, then submit form correctly, and press refresh to auto submit form, it does it? This is a major security risk here is my code, thanks:

Code: session_start();

$RandomStr = md5(microtime());// md5 to generate the random string
$text = rand(10000,99999);
$_SESSION["key"] = $text;
$height = 25;
$width = 35;

$image_p = imagecreate($width, $height);
$black = imagecolorallocate($image_p, 100, 5, 5);
$white = imagecolorallocate($image_p, 155, 155, 025);
$font_size = 16;
$text=substr($_SESSION['key'],0,3);
imagestring($image_p, $font_size, 5, 5, $text, $white);
imagejpeg($image_p, null, 80);

then my HTML:

Code: <tr class="bts ce"><td colspan=2><b>Security Code Confirmation</b></td></tr>

<tr>
<td align="right">Your unique security code<input type="hidden" name="secId" value="76c2b0e6f20ed0f1b209bcf39dee8e06"></td>
<td>
<img src="php_captcha.php">

<span class="desc">If The images are broke, please contact us.</span></span>
</td>
</tr>
Is there a way so people cant auto submit form?

Captcha works if u refresh but people can just auto submit the form and it will keep submiiting...

Your Answer:

Login to answer

Other forums

Backflush
I am looking for a report in SAP that would give me a list of all parts that are populated with a ba

Simple code help with redirects
I am trying to figure out a redirect script that detects if the browser is IE 7 and if it does, redi

no idea what to do...
I'm fed up. I had issues with code that I have working on a different site that didn't work on my cu

Replacing a string on click of a button
Hi! Is there a way to replace a string on a click of a text link?

This is what I've come up w

Coefficient of a Restitution Hints
Hello. I was wondering if anyone can give me hints on how to write this program...

The coeffi

simple ping code
been searchin the site/web and found code thats simple but doesnt work.

I have a personal we

Displaying values from a SQL count...
Hi,
Easy enough question i just forget the exact method ..
I have ...

Code: //count win

$_GET problem
Hi all,

Have a bit of a problem with a little piece of code, I am not sure if this should be

Text to picture Generator
Hello, i have found this script and it works really good^^ But i have one problem, i would like to c

Can I call a class inside a function?
I have a class written in another file that handles my image resizing.

Can I do this (php say