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

Why does first ever HttpSendRequest take longer?
I promise this isn't as simple as it sounds. I'm wondering why the the first ever call to HttpSendRe

animation progress while uploading files?
Hello, i have some website form to upload few files to server. i want to put some gif animation whi

records between 2 dates
Hello all,

I have a date tracked table which contains effective_start_date and effective

Advice on how to delete a mysql row using my form
Hi,

I am very new to php and am struggling to work out how to delete a portfolio item (a row

Required to login help
I'm trying to set up my site so users have to be logged into the forum to access the site.I've been

PHP - HTML
Could anyone give me some GOOD sample links for php - html email tutorial.

Thanks!

Error Messaging not working
I changed the way my form tells the user of an error. But I can't seem to get it to work properly.

disable all input buttons
Hello Friends,

suppose i do have a file ( file.php ) has a submit button

Code: [Sele

Weird Problem with curl while sending data
I am facing a weird problem with sending data to a site via curl.

If i send the value by this

returning data from an ssh2_exec()
here's what i got.


$conn = ssh2_connect($this->_host);
ssh2_auth_password($c