public function getReCaptchaImage()
 {
     $fontsDirectory = __DIR__ . '/../../../../include/captcha/';
     $aFonts = array($fontsDirectory . 'fonts/VeraBd.ttf', $fontsDirectory . 'fonts/VeraIt.ttf', $fontsDirectory . 'fonts/Vera.ttf');
     $oVisualCaptcha = new \PhpCaptcha($aFonts, 200, 60);
     $oVisualCaptcha->Create(__DIR__ . '/../../../../images/cache/recaptcha.png');
     return '/images/cache/recaptcha.png';
 }

 function image()
 {
     $imagesPath = ROOT . DS . APP_DIR . DS . 'Vendor' . DS . 'PhpCaptcha' . DS . 'fonts' . DS;
     $aFonts = array($imagesPath . 'VeraBd.ttf', $imagesPath . 'VeraIt.ttf', $imagesPath . 'Vera.ttf');
     $oVisualCaptcha = new PhpCaptcha($aFonts, 200, 60);
     $oVisualCaptcha->UseColour(true);
     //$oVisualCaptcha->SetOwnerText('Source: '.FULL_BASE_URL);
     $oVisualCaptcha->SetNumChars(6);
     $oVisualCaptcha->Create();
 }

 function image()
 {
     $imagesPath = realpath(VENDORS . 'phpcaptcha') . '/fonts/';
     $aFonts = array($imagesPath . 'VeraBd.ttf', $imagesPath . 'VeraIt.ttf', $imagesPath . 'Vera.ttf');
     $oVisualCaptcha = new PhpCaptcha($aFonts, 200, 60);
     $oVisualCaptcha->UseColour(true);
     //$oVisualCaptcha->SetOwnerText('Source: '.FULL_BASE_URL);
     $oVisualCaptcha->SetNumChars(6);
     $oVisualCaptcha->Create();
 }

 public function executeImage()
 {
     $theme = sfConfig::get("app_phpcaptcha_theme", "Small");
     if (class_exists("PHPCaptcha" . $theme . "Theme")) {
         eval("\$theme = new PHPCaptcha" . $theme . "Theme();");
     } else {
         $theme = new PHPCaptchaSmallTheme();
     }
     $oVisualCaptcha = new PhpCaptcha($theme);
     $oVisualCaptcha->setOwnerText(sfConfig::get("app_phpcaptcha_ownertext", ""));
     $oVisualCaptcha->setHeight(sfConfig::get("app_phpcaptcha_height", $theme->getOption('height')));
     $oVisualCaptcha->setWidth(sfConfig::get("app_phpcaptcha_width", $theme->getOption('width')));
     $oVisualCaptcha->Create();
     return sfView::NONE;
 }

 public function isFlooding()
 {
     $uid = GWF_Session::getUserID();
     $uname = GWF_Shoutbox::generateUsername();
     $euname = GDO::escape($uname);
     $table = GDO::table('GWF_Shoutbox');
     $max = $uid === 0 ? $this->module->cfgMaxPerDayGuest() : $this->module->cfgMaxPerDayUser();
     //		$cut = GWF_Time::getDate(GWF_Time::LEN_SECOND, time()-$this->module->cfgTimeout());
     //		$cnt = $table->countRows("shout_uname='$euname' AND shout_date>'$cut'");
     # Check captcha
     if ($this->module->cfgCaptcha()) {
         require_once GWF_CORE_PATH . 'inc/3p/Class_Captcha.php';
         if (!PhpCaptcha::Validate(Common::getPostString('captcha'), true)) {
             return GWF_HTML::err('ERR_WRONG_CAPTCHA');
         }
     }
     # Check date
     $timeout = $this->module->cfgTimeout();
     $last_date = $table->selectVar('MAX(shout_date)', "shout_uid={$uid} AND shout_uname='{$euname}'");
     $last_time = $last_date === NULL ? 0 : GWF_Time::getTimestamp($last_date);
     $next_time = $last_time + $timeout;
     if ($last_time + $timeout > time()) {
         return $this->module->error('err_flood_time', array(GWF_Time::humanDuration($next_time - time())));
     }
     # Check amount
     $today = GWF_Time::getDate(GWF_Date::LEN_SECOND, time() - $timeout);
     $count = $table->countRows("shout_uid={$uid} AND shout_date>='{$today}'");
     if ($count >= $max) {
         return $this->module->error('err_flood_limit', array($max));
     }
     # All fine
     return false;
 }

 /**
  * @return void
  */
 private function _processCaptcha()
 {
     @session_start();
     $captchaHandler = CampRequest::GetVar('f_captcha_handler', '', 'POST');
     if (!empty($captchaHandler)) {
         $captcha = Captcha::factory($captchaHandler);
         if (!$captcha->validate()) {
             $this->m_error = new PEAR_Error('The code you entered is not the same as the one shown.',
             ACTION_SUBMIT_COMMENT_ERR_INVALID_CAPTCHA_CODE);
             return FALSE;
         }
     } else {
         $f_captcha_code = CampRequest::GetVar('f_captcha_code');
         if (is_null($f_captcha_code) || empty($f_captcha_code)) {
             $this->m_error = new PEAR_Error('Please enter the code shown in the image.',
             ACTION_SUBMIT_COMMENT_ERR_NO_CAPTCHA_CODE);
             return FALSE;
         }
         if (!PhpCaptcha::Validate($f_captcha_code, true)) {
             $this->m_error = new PEAR_Error('The code you entered is not the same with the one shown in the image.',
             ACTION_SUBMIT_COMMENT_ERR_INVALID_CAPTCHA_CODE);
             return FALSE;
         }
     }
     return TRUE;
 }

 protected function doClean($value)
 {
     $clean = (string) $value;
     if (!PhpCaptcha::Validate($clean)) {
         throw new sfValidatorError($this, 'invalid', array('value' => $value));
     }
     return $clean;
 }

 public function execute()
 {
     # Don't store this url.
     GWF3::setConfig('store_last_url', false);
     # Load the Captcha class
     require GWF_CORE_PATH . 'inc/3p/Class_Captcha.php';
     # disable Logging
     GWF3::setConfig('log_request', false);
     # disable HTTP Caching
     GWF_HTTP::noCache();
     # Setup Font, Color, Size
     $aFonts = $this->module->cfgCaptchaFont();
     $rgbcolor = $this->module->cfgCaptchaBG();
     $width = $this->module->cfgCaptchaWidth();
     $height = $this->module->cfgCaptchaHeight();
     $oVisualCaptcha = new PhpCaptcha($aFonts, $width, $height, $rgbcolor);
     # Output the captcha
     die($oVisualCaptcha->Create('', Common::getGetString('chars', true)));
 }

function crackcha_next(WC_Challenge $chall)
{
    if (crackcha_round_over()) {
        header('Content-Type: text/plain');
        if (false === crackcha_insert_high($chall)) {
            echo GWF_HTML::lang('ERR_DATABASE', array(__FILE__, __LINE__));
            return;
        } else {
            echo $chall->lang('msg_insert_high') . PHP_EOL;
            echo crackcha_reset($chall);
            return;
        }
    }
    require_once GWF_CORE_PATH . 'inc/3p/Class_Captcha.php';
    $chars = GWF_Random::randomKey(5, GWF_Random::ALPHAUP);
    crackcha_increase_count();
    GWF_Session::set('WCC_CRACKCHA_CHARS', $chars);
    $aFonts = array(GWF_PATH . 'extra/font/teen.ttf');
    $rgbcolor = GWF_CAPTCHA_COLOR_BG;
    $oVisualCaptcha = new PhpCaptcha($aFonts, 210, 42, $rgbcolor);
    $oVisualCaptcha->Create('', $chars);
}

 function image()
 {
     $imagesPath = APP . 'vendors' . DS . 'phpcaptcha' . '/fonts/';
     $aFonts = array($imagesPath . 'VeraBd.ttf', $imagesPath . 'VeraIt.ttf', $imagesPath . 'Vera.ttf');
     $oVisualCaptcha = new PhpCaptcha($aFonts, 220, 60);
     $oVisualCaptcha->UseColour(true);
     $oVisualCaptcha->SetNumLines(false);
     $oVisualCaptcha->DisplayShadow(false);
     //$oVisualCaptcha->SetOwnerText('Source: '.FULL_BASE_URL);
     $oVisualCaptcha->SetNumChars(5);
     $oVisualCaptcha->Create();
 }

    /**
     * Reads the input parameters and sets up the blogcomment action.
     *
     * @param array $p_input
     */
    public function __construct(array $p_input)
    {
        $this->m_name = 'submit_blogcomment';
        $this->m_defined = true;


        $this->m_properties['blogentry_id'] = $p_input['f_blogentry_id'];
        $BlogEntry = new BlogEntry($this->m_properties['blogentry_id']);

        if (!$BlogEntry->exists()) {
            $this->m_error = new PEAR_Error('None or invalid blogentry was given.', ACTION_BLOGCOMMENT_ERR_INVALID_ENTRY);
            return;
        }
        /*
        if (!isset($p_input['f_blogcomment_title']) || empty($p_input['f_blogcomment_title'])) {
            $this->m_error = new PEAR_Error('The comment subject was not filled in.', ACTION_BLOGCOMMENT_ERR_NO_TITLE);
            return;
        }
        */
        if (!isset($p_input['f_blogcomment_content']) || empty($p_input['f_blogcomment_content'])) {
            $this->m_error = new PEAR_Error('The comment content was not filled in.', ACTION_BLOGCOMMENT_ERR_NO_CONTENT);
            return;
        }
        if (SystemPref::Get('PLUGIN_BLOGCOMMENT_USE_CAPTCHA') == 'Y') {
            @session_start();
            $f_captcha_code = $p_input['f_captcha_code'];
            if (is_null($f_captcha_code) || empty($f_captcha_code)) {
                $this->m_error = new PEAR_Error('Please enter the code shown in the image.', ACTION_BLOGCOMMENT_ERR_NO_CAPTCHA_CODE);
                return false;
            }
            if (!PhpCaptcha::Validate($f_captcha_code, true)) {
                $this->m_error = new PEAR_Error('The code you entered is not the same with the one shown in the image.', ACTION_BLOGCOMMENT_ERR_INVALID_CAPTCHA_CODE);
                return false;
            }
        }

        $this->m_properties['title'] = $p_input['f_blogcomment_title'];
        $this->m_properties['content'] = $p_input['f_blogcomment_content'];
        $this->m_properties['mood_id'] = $p_input['f_blogcomment_mood_id'];
        $this->m_properties['user_name'] = $p_input['f_blogcomment_user_name'];
        $this->m_properties['user_email'] = $p_input['f_blogcomment_user_email'];

        $this->m_blogcomment = new BlogComment($p_input['f_blogcomment_id']);
    }

 public static function validate($checkType, $value)
 {
     $blnReturn = FALSE;
     if (array_key_exists($checkType, self::$checks)) {
         if (empty(self::$checks[$checkType])) {
             $blnReturn = TRUE;
         } else {
             switch ($checkType) {
                 case VFORM_CAPTCHA:
                     $blnReturn = PhpCaptcha::Validate(ValidForm::get($value));
                     break;
                 default:
                     $blnReturn = preg_match(self::$checks[$checkType], $value);
             }
         }
     } else {
         $blnReturn = preg_match($checkType, $value);
     }
     return $blnReturn;
 }

/**
 * Check posted comment with CAPTCHA
 */
function checkCommentWithCaptcha()
{
    global $config, $pathToIndex, $userName, $sessionState, $app;
    require $pathToIndex . '/plugins/captcha/php-captcha.inc.php';
    switch ($config['language']) {
        case 'japanese':
            $textParts = array('コメント認証', 'コメント内容が認証出来ません。');
            break;
        default:
            $textParts = array('Not Allowed', 'Request Not Allowed.');
            break;
    }
    if (PhpCaptcha::Validate($_POST['captcha_phrase'])) {
        return true;
    } else {
        $additionalTitle = $textParts[0];
        $content = '<h2>' . $textParts[0] . '</h2>' . "\n" . '<div class="important warning">' . "\n" . '<p>' . $textParts[1] . '</p>' . "\n" . '</div>' . "\n";
        $item = array('title' => $app->setTitle($additionalTitle), 'contents' => $content, 'result' => '', 'pager' => '');
        $app->display($item, $sessionState);
        exit;
    }
}

 static function CaptchaCheck($text)
 {
     return PhpCaptcha::Validate($text);
 }

 function PhpCaptchaColour($aFonts, $iWidth = CAPTCHA_WIDTH, $iHeight = CAPTCHA_HEIGHT)
 {
     // call parent constructor
     parent::PhpCaptcha($aFonts, $iWidth, $iHeight);
     // set options
     $this->UseColour(true);
 }

<?php

// ini_set('display_errors', 1);
define('MODX_API_MODE', true);
// initialize $modx
require_once dirname(dirname(dirname(dirname(__FILE__)))) . '/index.php';
define('CAPTCHA_SESSION_ID', $modx->getOption('modcaptcha.session_id', null, 'php_captcha'));
// include captcha class
require MODX_CORE_PATH . 'components/modcaptcha/php-captcha.inc.php';
$fonts = array('fonts/VeraBd.ttf', 'fonts/VeraIt.ttf', 'fonts/Vera.ttf');
$width = $modx->getOption('modcaptcha.width', null, 150);
$height = $modx->getOption('modcaptcha.height', null, 38);
$chars = $modx->getOption('modcaptcha.chars', null, 'a-z,A-Z,1-9');
$captcha = new PhpCaptcha($fonts, $width, $height);
$captcha->SetCharSet($chars);
$captcha->SetNumChars($modx->getOption('modcaptcha.num_chars', null, 5));
$captcha->SetNumLines($modx->getOption('modcaptcha.num_lines', null, 2));
$captcha->Create();

 /**
  *	This function returns true if the variable matches captcha image
  *
  *	@param $val			The value to test.
  *	@param $opts		(not required)
  *	@param $formelement	(not required)
  */
 function captcha($val, $opts = '', $formelement = null)
 {
     include_once YD_DIR_HOME . '/3rdparty/captcha/php-captcha.inc.php';
     return PhpCaptcha::Validate($val);
 }

function fn_image_verification($condition, $req)
{
    if (fn_needs_image_verification($condition) == false) {
        return true;
    }
    $verification_id = !empty($req['verification_id']) ? $req['verification_id'] : '';
    $verification_answer = !empty($req['verification_answer']) ? $req['verification_answer'] : '';
    if (PhpCaptcha::Validate($verification_id, $verification_answer) == false) {
        fn_set_notification('E', __('error'), __('error_confirmation_code_invalid'));
        return false;
    }
    // Do no use verification after first correct validation
    if (Registry::get('settings.Image_verification.hide_after_validation') == 'Y') {
        $_SESSION['image_verification_ok'] = true;
    }
    return true;
}

<?php

/*************************
  Coppermine Photo Gallery
  ************************
  Copyright (c) 2003-2014 Coppermine Dev Team
  v1.0 originally written by Gregory Demar

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License version 3
  as published by the Free Software Foundation.

  ********************************************
  Coppermine version: 1.6.01
  $HeadURL$
  $Revision$
**********************************************/
define("IN_COPPERMINE", true);
require "include/init.inc.php";
require "include/captcha.inc.php";
/**
 * Fonts to create the captcha image
 */
$aFonts = array('images/fonts/acidic.ttf', 'images/fonts/hurryup.ttf');
// create new image
$oPhpCaptcha = new PhpCaptcha($aFonts, 150, 30, 5, 20, false);
$oPhpCaptcha->Create();

 public function verify()
 {
     $response = PhpCaptcha::Validate($this->trellis->input['antispam']);
     if (!$response) {
         $this->error = 'antispam_phpcaptcha_fail';
     }
     return $response;
 }