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

Calling All PHPFREAKS Blackberry Users
Are you a member of PHPFreaks and have a blackberry? Well RIM just recently released Blackberry Mes

What is SAP Avatar ?
Hi All,

This G.Satish , my boss asked me to explore on SAP Avatar. I searced in internet

JSON SORT WITH PHP
I have two products that I want to sort by say "Id:17, value: xxx" using php
The page w

update the selected existing records of database
Hi frndz,
I am new to php and get stuck....

Edit.php > Update.php > Updatea

DataTable Help Required
Hi all I am creating an app that utilises and MS Access back end and queries it quite a bit at vario

How to calculate days from variable date?
This will be easy for one of you gurus. I want to fetch the date from a variable date, for example:<

I would like "for" to wait 5 sec
I would like my 'for' loop to wait 5 sec before second iteration.


for ($i=0; $i<10

PHP Thumbnail Creation
Ok so i use this function to create thumbnails:

Code: [Select]function createthumb($name,$fil

j1inmis Ouput layout changes
Hi,

Can anybody tell how can j1inmis output layout can be changed so that vendor names ge

server trace logs
could any one tell me from where do i get error logs in xMII??I want to check the reason for dtabase