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

insert quotes
Hi,

I have an output like this:
Code: john,18,Cancer
How can I change this to
Code:

import table with dependency
Hi

What is the best way to import table back which has dependency?

SQL> cre

replacements
I have a variable in my PHP script like

ASSFDDDDDDDDDDDDDASDDDDDDDDARYTRHKKHHHHHHHHHHH and p

losing variables between php brackets
Hi

have got this code:
Code: $id=mysql_result($result,0,"itemid");
$title=mys

getting Vars to pass to next page.
Hello all,
I have a confusing situation on my hands, i am a member of a gaming community and we

How do I know when getBounds Method is ready to be called.
I have an application that changes out stylesheets client side. Once I change stylesheet the browse

Give me all your tricks for minimizing jar file size

Hi, I'm coming close to releasing my J2ME game... I am kicking up against the 64k size barrier w

PHP Session Issue
I'm having an issue with one section on my website dealing with sessions. Now I know that myself and

php require help needed
Ok i tried to use the search funtion but the word require is everywhere.

i'm really new to cr

Change Web page language
i doing this thing first time but i dont find any suitable solution for it. On the demand of user. I