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 IMAGE UPLOAD SCRIPT
Hi for the last week i have been looking for scripts that will upload a photo to a certain folder wh

does anyone know a php script to send mail using gmails/googles free smtp server
cause i heard u can do that but i dont know how

Unable to customise toolbar in FCK
Generate multilayered array from string.
ok so i have a string that looks like this:
Code: [Select]blog:edit_all,delete_all|users:edit_all

my sql select id and then update problem.
I need to select some auto incremented ids out of a database and then use those id in a where statem

PHP error on MySQL insert
I'm sure it's the simplest of issues, but I can't recall why this isn't working.

Code: [Selec

Querying info from one table based on info in another
Hi, I am currently trying to make a part for my user driven website where one user can subscribe to

Web Host List
Here is a list of web hosts that offer PHP and MySQL. It is no where near a full list, but it is mos

Help with usergroups? prolly really quick
So were coding our own forums for a game system we made an we have the users level setup but now I n

Problem with a select distinct
I have a problema with a select distinct, I have the next sql:

select distinct a,b,c,d fr

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