diff options
Diffstat (limited to 'extensions/ConfirmEdit/MathCaptcha.class.php')
-rw-r--r-- | extensions/ConfirmEdit/MathCaptcha.class.php | 50 |
1 files changed, 0 insertions, 50 deletions
diff --git a/extensions/ConfirmEdit/MathCaptcha.class.php b/extensions/ConfirmEdit/MathCaptcha.class.php deleted file mode 100644 index ac220baa..00000000 --- a/extensions/ConfirmEdit/MathCaptcha.class.php +++ /dev/null @@ -1,50 +0,0 @@ -<?php - -class MathCaptcha extends SimpleCaptcha { - - /** Validate a captcha response */ - function keyMatch( $answer, $info ) { - return (int)$answer == (int)$info['answer']; - } - - function addCaptchaAPI( &$resultArr ) { - list( $sum, $answer ) = $this->pickSum(); - $index = $this->storeCaptcha( array( 'answer' => $answer ) ); - $resultArr['captcha']['type'] = 'math'; - $resultArr['captcha']['mime'] = 'text/tex'; - $resultArr['captcha']['id'] = $index; - $resultArr['captcha']['question'] = $sum; - } - - /** Produce a nice little form */ - function getForm() { - list( $sum, $answer ) = $this->pickSum(); - $index = $this->storeCaptcha( array( 'answer' => $answer ) ); - - $form = '<table><tr><td>' . $this->fetchMath( $sum ) . '</td>'; - $form .= '<td>' . Html::input( 'wpCaptchaWord', false, false, array( 'tabindex' => '1', 'autocomplete' => 'off', 'required' ) ) . '</td></tr></table>'; - $form .= Html::hidden( 'wpCaptchaId', $index ); - return $form; - } - - /** Pick a random sum */ - function pickSum() { - $a = mt_rand( 0, 100 ); - $b = mt_rand( 0, 10 ); - $op = mt_rand( 0, 1 ) ? '+' : '-'; - $sum = "{$a} {$op} {$b} = "; - $ans = $op == '+' ? ( $a + $b ) : ( $a - $b ); - return array( $sum, $ans ); - } - - /** Fetch the math */ - function fetchMath( $sum ) { - if ( class_exists( 'MathRenderer' ) ) { - $math = MathRenderer::getRenderer( $sum, array(), MW_MATH_PNG ); - } else { - throw new MWException( 'MathCaptcha requires the Math extension for MediaWiki versions 1.18 and above.' ); - } - $html = $math->render(); - return preg_replace( '/alt=".*?"/', '', $html ); - } -} |