Ubuntu灯堆栈上的蛋糕始终发送<；？php？>；成页

我在Ubuntu 14.10上的Cake应用程序有问题。我尝试从页面中查看源代码，它显示：

<?php

---

您是否使用带有
.php
扩展名的URL？是否有一个.htaccess文件用于将URL映射到文件？普通的PHP文件在这个服务器上工作吗？不，我使用的是CakePHP。是的，有一个.htaccess。htaccess和index.php映射的源代码如下：它只在CakePHP应用程序中发生，而在普通php中没有发生。我没有尝试使用其他框架或CMS。这只是AJAX回复，还是所有页面请求？发生这种情况时会呈现哪些代码、控制器、视图/模板？（如果您认为代码适合于澄清此问题，请将其添加到问题中，而不是添加粘贴板-这使新读者更容易理解问题的当前状态）。在所有页面请求中都会发生这种情况。AJAX或否。您可以看到它只在源代码中显示的图像，而不是在渲染视图中显示的图像。谢谢你的观察。好吧，我把这个留给蛋糕开发者看。最后一点澄清，前控制器是否已从默认版本修改？在蛋糕应用程序中，您的做法有哪些不同之处？
<?php
/**
 * Index
 *
 * The Front Controller for handling every request
 *
 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 *
 * Licensed under The MIT License
 * For full copyright and license information, please see the LICENSE.txt
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 * @link          http://cakephp.org CakePHP(tm) Project
 * @package       app.webroot
 * @since         CakePHP(tm) v 0.2.9
 * @license       http://www.opensource.org/licenses/mit-license.php MIT License
 */

ini_set('memory_limit', '256M');

/**
 * Use the DS to separate the directories in other defines
 */
if (!defined('DS')) {
    define('DS', DIRECTORY_SEPARATOR);
}

/**
 * These defines should only be edited if you have cake installed in
 * a directory layout other than the way it is distributed.
 * When using custom settings be sure to use the DS and do not add a trailing DS.
 */

/**
 * The full path to the directory which holds "app", WITHOUT a trailing DS.
 *
 */
if (!defined('ROOT')) {
    define('ROOT', dirname(dirname(dirname(__FILE__))));
}

/**
 * The actual directory name for the "app".
 *
 */
if (!defined('APP_DIR')) {
    define('APP_DIR', basename(dirname(dirname(__FILE__))));
}

/**
 * The absolute path to the "cake" directory, WITHOUT a trailing DS.
 *
 * Un-comment this line to specify a fixed path to CakePHP.
 * This should point at the directory containing `Cake`.
 *
 * For ease of development CakePHP uses PHP's include_path. If you
 * cannot modify your include_path set this value.
 *
 * Leaving this constant undefined will result in it being defined in Cake/bootstrap.php
 *
 * The following line differs from its sibling
 * /lib/Cake/Console/Templates/skel/webroot/index.php
 */
//define('CAKE_CORE_INCLUDE_PATH', ROOT . DS . 'lib');

/**
 * Editing below this line should NOT be necessary.
 * Change at your own risk.
 *
 */
if (!defined('WEBROOT_DIR')) {
    define('WEBROOT_DIR', basename(dirname(__FILE__)));
}
if (!defined('WWW_ROOT')) {
    define('WWW_ROOT', dirname(__FILE__) . DS);
}

// for built-in server
if (php_sapi_name() === 'cli-server') {
    if ($_SERVER['REQUEST_URI'] !== '/' && file_exists(WWW_ROOT . $_SERVER['PHP_SELF'])) {
        return false;
    }
    $_SERVER['PHP_SELF'] = '/' . basename(__FILE__);
}

if (!defined('CAKE_CORE_INCLUDE_PATH')) {
    if (function_exists('ini_set')) {
        ini_set('include_path', ROOT . DS . 'lib' . PATH_SEPARATOR . ini_get('include_path'));
    }
    if (!include 'Cake' . DS . 'bootstrap.php') {
        $failed = true;
    }
} else {
    if (!include CAKE_CORE_INCLUDE_PATH . DS . 'Cake' . DS . 'bootstrap.php') {
        $failed = true;
    }
}
if (!empty($failed)) {
    trigger_error("CakePHP core could not be found. Check the value of CAKE_CORE_INCLUDE_PATH in APP/webroot/index.php. It should point to the directory containing your " . DS . "cake core directory and your " . DS . "vendors root directory.", E_USER_ERROR);
}

App::uses('Dispatcher', 'Routing');

$Dispatcher = new Dispatcher();
$Dispatcher->dispatch(
    new CakeRequest(),
    new CakeResponse()
);