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

Array disappearing in foreach loop
Okay, I have this problem where an array will become undefined in a foreach loop.

Here is the

How to restrict the display of report variants
Hello All,

I want t know how to restrict the display of report variants.
I mean, whe

how to make database item unique
Hey guys,

is it possible to do this:

I have the database item $title being pulled for

Multithreading design
Hi

I have come up with a Singleton class that manages a pool of database connections. Basical

problem with php server update from mid 2009
Hi,

I have this navigation menu on 2 websites which used to work just fine. After a recent up

php mysql query from input textbox
Hi,

I have a text box, in that i have given the mysql query. I can able to get the query in v

confused between ' ' and " "
there is a php i set:
$begin_date_query = mysql_query( "SELECT SUBDATE(due_date, INTERVAL $d

pspell
using pspell, is it possible to get words that would be best in the current phrase?

For examp

Multiple submit forms inside a mysql array page
Hi all,

Im having trouble to get the beneath script to work the thing i can't seem to get wor

Object Interfaces
EDIT: Never mind, I just updated to php 5.

Hey all,

I'm currently experimenting with p