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 
34 
Other forums
Greek characters in php
Hi,
I'm making a script and I m using for first time greek characters.
I started to write
Match stored value with the current value in a loop
Hello,
I have a MySQL db were I store articles in.
I have a form to fill these article
Unidentified index error in a simple form
I have been trying to make an HTML form that is handled by a PHP script. So far my attempts to get i
need help with date function
i have following form for date
Code: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01
help me fix these syntax errors...
I keep getting multiple syntax errors on this script like this one:
Parse error: syntax error
Passing PHP variables from one page to another
Hello-
I'm having trouble figuring out how to transport a variable from one php file to anoth
Optimize Code
Just started getting into the use of cookies. The following code will redirect users to a set URL s
downloading a file as HTML
Hi.
I'm rather confused with forcing a download. I just want to save dynamic content (from $_SESS
Shuffle between users ??
I have multiple $users in table. I need to send them $message.
I need to send the next messag
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
