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

parse error
Parse error: syntax error, unexpected '[', expecting ')' in /Users/admin/Sites/phptest/array.php on

Need help with basic sql
Hi,

I am using oracle 10g, and having some small doubts related to sql , here goes the si

Specific name typed, specific image shown on html page
Hello,

Fairly new to PHP and was curious if someone might know how to solve a fairly simple r

Why do I get this error
Parse error: syntax error, unexpected T_STRING, expecting ',' or ';' in /home/a5488351/public_html/b

Disabling SAP menu
How do I disable SAP menu for all the users and just restrict them to User Menu in SAP ECC 6.0?

Is there a more efficient way to code this than what I have?
I have three associative arrays.

$combinedSettings
$userSettings
$defaultSettings

Removing Title From database problem
Hi again ! i am having an issue with updating database. When i update any price of a title it remove

Results from Db outputted twice
Hey guys.. for come reason my data is outputted twise shown in the image below and i cant figure out

Send inserts to mysql thru port 80
Hi!

I have an application that must do some inserts in a mysql db. This db is behind a firewa

LinkedList help
Ok so I just learned quickly about lists, so I have a not too hard project I think, but am having a