wenda-php/protected/controller/ErrorController.php

<?php
/**
 * ErrorController
 * Feel free to change this and customize your own error message
 *
 * @author darkredz
 */
if (! defined ( 'IN_ZHASK' )) {
	exit ( 'invalid request' );
}
class ErrorController extends DooController{

    public function index(){
    	
        $this->Messager ( "请输入正确的浏览地址", "/" );
    }
	
    public function SCS(){
    	

require_once ('./protected/plugin/class.geetestlib.php');

//require_once dirname(dirname(__FILE__)) . '/lib/class.geetestlib.php';
$GtSdk = new GeetestLib();
session_start();
$return = $GtSdk->register();

if ($return) {
    $_SESSION['gtserver'] = 1;
    $result = array(
            'success' => 1,
            'gt' => CAPTCHA_ID,
            'challenge' => $GtSdk->challenge
        );
    echo json_encode($result);
}else{
    $_SESSION['gtserver'] = 0;
    $rnd1 = md5(rand(0,100));
    $rnd2 = md5(rand(0,100));
    $challenge = $rnd1 . substr($rnd2,0,2);
    $result = array(
            'success' => 0,
            'gt' => CAPTCHA_ID,
            'challenge' => $challenge
        );
    $_SESSION['challenge'] = $result['challenge'];
    echo json_encode($result);
}
    }

}
?>