Project captcha (CleanView - Demo - Download)

Description

The name of this project tells everything by itself ! It's a little captcha generator which creates human-readable check codes which will keep you away from spammers and flooders. It requires PHP 4/5 with GD library.

Styles Demo:: captcha.php?style=[0-3]	s1 s2
	s3 s4

Docs

Script usage:

=Form page=
1. add image and input fileds to your form (as in demo)
2. make sure you used session_start(); at the beginning of the page.
=Target page=
3. include and instantiate a new Captcha() object
4. use the method isValid() to check if the entered code is valid

D
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<?
session_start(); //<-must start SESSION if not done before
include 'class.captcha.php';
if($_POST['sent']=='true'){
$captcha= new Captcha();
if($captcha->isValid()){
echo '<font color=green>Correct code !</font>';
} else {
echo '<font color=red>Invalid code :(</font>';
}
}
// == FORM
$thisFile=$_SERVER['PHP_SELF'].'?'.$_SERVER['QUERY_STRING'];
if(!strstr($_SERVER['QUERY_STRING'], 'PHPSESSID')) $thisFile.='&PHPSESSID='.session_id();
echo '<form action="'.$thisFile.'#demo" method="post">
<a href="captcha_test.php" title="Reload"><img src="captcha.php?style=0&PHPSESSID='.session_id().'" alt="capcha image" border="0" /></a>
<br>Code:<input type="text" name="cap_code" size="5">
<input type="hidden" name="sent" value="true">
<input type="submit" name="sub" value="Check">
</form>';
?>

Demo

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