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:

Did you know?Explore Trending and Topic pages for more stories like this.
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

Modal Popup Help
Hi guys, I have a modal popup with an iframe. How can i send data from a label or textbox to the ifr

Transferring session variables into MySQL
I am trying to transfer $_SESSION variables into MySQL. However there is an error in my MySQL statem

help with image upload code
Hello,

right now this code I have resizes images and then places them into the uploads folder

help with calculations on a flat text file
hello,
I have this code below that is attached to a flat file like this:
Email:LastName:FirstN

insert Multiple rows into the table from that table data
Hi All,

I have a requirement like to insert mulitple rows into the table from that

Populate drop down list from table??
Lets say for arguments sake that i have a table which contains the numbers 1 to 10.
How can i get

Download Image from URL and Upload it
Ok, I have been googling for the last 1/2 hour trying to figure this out, Most likely I'm just not s

Prevent PHP mail( ) from appending hostname to from address
Hey guys,

I want to be able to send texts to phones via email (since each phone has their own

Read from forum
Haven't written anything forever and I would like to get back.
What I'm trying to do is getting t

COOIS - Saving Object Overview WIP Status layouts
COOIS - Would like to be able to save the layout of an Object Overview - WIP Status report. There i

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