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<?php class WpProQuiz_Helper_Captcha { private static $INSTANCE = null; private $_captcha = null; private $_supp = false; private $_prefix = ''; public function __construct() { if(!class_exists('ReallySimpleCaptcha')) return; $this->_captcha = new ReallySimpleCaptcha(); $this->_captcha->tmp_dir = WPPROQUIZ_CAPTCHA_DIR.'/'; $this->_captcha->file_mode = 0666; $this->_captcha->answer_file_mode = 0666; if(!$this->_captcha->make_tmp_dir()) { $this->_supp = false; return; } $this->_supp = true; } public function getPrefix() { return $this->_prefix; } public function isSupported() { return $this->_supp; } public function createImage() { if(!$this->isSupported()) return false; $w = $this->_captcha->generate_random_word(); $this->_prefix = mt_rand(); return $this->_captcha->generate_image($this->_prefix, $w); } public function remove($prefix) { if(!$this->isSupported()) return; $this->_captcha->remove($prefix); } public function check($prefix, $answer) { if(!$this->isSupported()) return; return $this->_captcha->check($prefix, $answer); } public function cleanup() { if(!$this->isSupported()) return; $this->_captcha->cleanup(); } /** * @return WpProQuiz_Helper_Captcha */ public static function getInstance() { if(WpProQuiz_Helper_Captcha::$INSTANCE == null) { WpProQuiz_Helper_Captcha::$INSTANCE = new WpProQuiz_Helper_Captcha(); } return WpProQuiz_Helper_Captcha::$INSTANCE; } }
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