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...

No comments posted yet

Your Answer:

Login to answer
312 Like 34 Dislike
Previous forums Next forums
Other forums

PHP FTP connect doesn't work with correct login
Hi!

i am working on this test code:
Quote<?php

$ftp_ser

Post, not working, please help
The error is:
Method Not Allowed
The requested method POST is not allowed for the URL /student

Oracle Connectivity
Hi Every One,

Can we access SAP from oracle database.If it possible then please spec

Content-Disposition: attachment; filename=... not working as i thought it should
taken the following code from the php.net site the script is not working.

what is not happeni

pls clear my confusion
Hi friends,

Pls solve my query .

what is the exact use of Scope Resolution Operator( i

Making multiple rows with one query
I have a table called efed_handler_characters with two fields handler_id and bio_id. What query 2 is

Can't find a decent web analytics!!!
I've downloaded and installed Piwik. It's location detection based on IP addresses is fairly inaccur

More pug propaganda.
http://www.youtube.com/watch?v=8Kkrmubsgf8

The commercial is definitely worth watching pug aw

How can you detect variable string in a massive string?
Ok guys, i need some help with this one.

I am going to be getting a large string, like 10-20

problem when runing a funciton
I am trying to connect to database using a funciton in a functions.php

<?php
funct

Sign up to write
Sign up now if you have flare of writing..
Login   |   Register
Follow Us
Indyaspeak @ Facebook Indyaspeak @ Twitter Indyaspeak @ Pinterest RSS



Play Free Quiz and Win Cash