| 1 |
<?php |
| 2 |
if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly |
| 3 |
|
| 4 |
class WatuTextCaptcha { |
| 5 |
// verify the captcha |
| 6 |
static function verify($question, $answer) { |
| 7 |
$answer = stripslashes($answer); |
| 8 |
|
| 9 |
$captcha_questions = get_option('watu_text_captcha'); |
| 10 |
$captcha_questions = explode("\n", $captcha_questions); |
| 11 |
|
| 12 |
$question = base64_decode($question); |
| 13 |
|
| 14 |
foreach($captcha_questions as $captcha_question) { |
| 15 |
list($q, $a) = explode("=", $captcha_question); |
| 16 |
$q = trim($q); |
| 17 |
$q = stripslashes($q); |
| 18 |
$a = stripslashes($a); |
| 19 |
|
| 20 |
if(strcmp($q, $question) == 0 and strcasecmp(trim($a), trim($answer)) == 0) return true; |
| 21 |
} |
| 22 |
|
| 23 |
// in any other case return false |
| 24 |
return false; |
| 25 |
} |
| 26 |
|
| 27 |
// generate the captcha |
| 28 |
static function generate() { |
| 29 |
$captcha_questions = get_option('watu_text_captcha'); |
| 30 |
$captcha_questions = explode("\n", $captcha_questions); |
| 31 |
|
| 32 |
// just get random |
| 33 |
shuffle($captcha_questions); |
| 34 |
$question = $captcha_questions[0]; |
| 35 |
list($q, $a) = explode("=", $question); |
| 36 |
$q = stripslashes($q); |
| 37 |
|
| 38 |
return trim($q)." <input type='text' name='watu_text_captcha_answer'>\n<input type='hidden' name='watu_text_captcha_question' value=\"".base64_encode(trim($q))."\">"; |
| 39 |
} |
| 40 |
} |
