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<?php |
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class WatuTextCaptcha { |
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// verify the captcha |
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static function verify($question, $answer) { |
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$answer = stripslashes($answer); |
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|
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$captcha_questions = get_option('watu_text_captcha'); |
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$captcha_questions = explode("\n", $captcha_questions); |
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|
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$question = base64_decode($question); |
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|
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foreach($captcha_questions as $captcha_question) { |
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list($q, $a) = explode("=", $captcha_question); |
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$q = trim($q); |
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$q = stripslashes($q); |
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$a = stripslashes($a); |
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|
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if(strcmp($q, $question) == 0 and strcasecmp(trim($a), trim($answer)) == 0) return true; |
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} |
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|
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// in any other case return false |
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return false; |
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} |
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|
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// generate the captcha |
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static function generate() { |
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$captcha_questions = get_option('watu_text_captcha'); |
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$captcha_questions = explode("\n", $captcha_questions); |
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|
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// just get random |
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shuffle($captcha_questions); |
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$question = $captcha_questions[0]; |
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list($q, $a) = explode("=", $question); |
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$q = stripslashes($q); |
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|
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return trim($q)." <input type='text' name='watu_text_captcha_answer'>\n<input type='hidden' name='watu_text_captcha_question' value=\"".base64_encode(trim($q))."\">"; |
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} |
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} |
