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

Adding Different Numbers From MySQL
Basically I have a mysql database with a couple prices as the following:

9.99
9.99
9.99

shift numbers with paging
Hi

How would i be able to display 10 numbers 1 2 3 4 5 6 7 8 9 10
and when I click next

Uploading files/images via forms
Hey all, I am building a database for work that will contain some minor data on plant species along

Warning: Cannot modify header information - headers already sent by (output sta
Warning: Cannot modify header information - headers already sent by (output started at /home/praylif

Problem with array max size.
Hi to everyone,
I've got a homework about filling a bidimensional array un spiral shape, I alre

delete comma
HI,

How to delete "," at the end of the string.
Code: $match = 2009/02/03/a2corr

Help, Base64 encoding url and decoding server side.
Hello everyone, i have a website with videos and games and also provide an embed code which people c

Remove Rows From Database ad
Hi All,

I have this:

Code: [Select]<?php
session_start();
include('../com

present value of sequence?
Hi

Please help me to find out the present value of sequence?

Thanks

BSP Ext - tableView - Sort - NEWBIE
Hi,
I have been trying to get the sort to work. I have defined the column definitions by fillin