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
help with php
It's not displaying or pulling anything out of the database.
Code: <html><
Mail Script Problems
I have created a PHP mail script. I am having a problem though. In $body i am trying to put two va
Mail form doesn't send Russian/Cyrillic characters correctly?
When someone enters foreign characters (like Cyrillic text, and Japanese/Chinese probably gives the
how to transport the Query and insfoset
Hi
I have created the query using SQ01........
How to created T-code for query..
Is there something wrong?
Hi all,
Just a quick question... can someone look at this code and see if something is wrong?
login and redirect
hello! can someone help me.. can you give me an idea.. I want to make a login page and redirects it
Multithreading design
Hi
I have come up with a Singleton class that manages a pool of database connections. Basical
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
Exporting new records
Trying to figure out the best way to set this up.
People register my site.
Their prof
Need help-Error istream header declaration
Hi Everyone ,
I am having issue with istream declaration. I am new to C programming.
can a
