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

convert static html data into dynamic
hi all

i need to convert a website which has static above 2000 articles into dynamic and add

Business Health Check
Hello

I need to create an online business health check for a client it will be multiple choi

noob question
i traying to do a php form with auto replay for both(me and the user who send me a mail),

a u

Does design fit in FPGA ?
Hi all,

I've made a large HCC-Design. Because of the program-size the compile process with th

Help with PHP and checkboxes
I am posting this for a friend of mine, i wrote a small script for her to process her form data to a

add to sql result
ok see rite now my sites hit counter is counted from the mysql visitor log i need to clear it aft

breaking a text file into paragraphs based on strings
I have a text file of email addresses that is all squished together. It looks like this:

abc

How would I protect......
I have a from, actually, a good amount of forms. How can I make it so you can't type the characters:

Unable to customise toolbar in FCK
PHP Cannot redeclare class
I have 6 files, and two of them do not seem to want to play well. I keep getting a "Cannot rede