Question

我正在尝试运行一个开源Web应用程序。它来自这里 - https://sourceforge.net/projects/labshare-sahara/ 它使用Zend PHP框架。

我的问题是使用以下代码。它无法找到文件，因此返回false，并显示消息：

“2012-08-20T00：01：08 + 02:00调试（7）：无法找到授权类 SAHARANS_Auth_Type_Database包含路径“

输出到日志文件。

   private function _loadClass($name)
       {
            /* Find the class to load. */
            $file = implode('/', explode('_', $name)) . '.php';
            foreach (explode(PATH_SEPARATOR, get_include_path()) as $path)
            {
                $this->_logger->debug("does $path/$file exist?"); //I added this
                if (file_exists($path . PATH_SEPARATOR . $file))
                {
                    return new $name();
                }
            }

            $this->_logger->debug("Unable to find auth class $name in include path.");
            return false;
        }

为了给出更多的上下文，我得到它来向日志打印更多信息 - 所以它每次都围绕for循环写入日志。这是输出：

2012-08-20T00:47:07+02:00 DEBUG (7): does C:\xampp\htdocs\Sahara-WI\WI\application/../library/SAHARANS/Auth/Type/Database.php exist?

2012-08-20T00:47:07+02:00 DEBUG (7): does C:\xampp\htdocs\Sahara-WI\WI\library/SAHARANS/Auth/Type/Database.php exist?

2012-08-20T00:47:07+02:00 DEBUG (7): does C:\xampp\htdocs\Sahara-WI\WI\application\models/SAHARANS/Auth/Type/Database.php exist?

2012-08-20T00:47:07+02:00 DEBUG (7): does C:\xampp\htdocs\Sahara-WI\WI\institution/SAHARANS/Auth/Type/Database.php exist?

2012-08-20T00:47:07+02:00 DEBUG (7): does ./SAHARANS/Auth/Type/Database.php exist?

2012-08-20T00:47:07+02:00 DEBUG (7): does C:\xampp\php\PEAR/SAHARANS/Auth/Type/Database.php exist?

2012-08-20T00:47:07+02:00 DEBUG (7): Unable to find auth class SAHARANS_Auth_Type_Database in include path

2012-08-20T00:47:07+02:00 DEBUG (7): does C:\xampp\htdocs\Sahara-WI\WI\application/../library/Sahara/Auth/Type/Database.php exist?

2012-08-20T00:47:07+02:00 DEBUG (7): does C:\xampp\htdocs\Sahara-WI\WI\library/Sahara/Auth/Type/Database.php exist

2012-08-20T00:47:07+02:00 DEBUG (7): does C:\xampp\htdocs\Sahara-WI\WI\application\models/Sahara/Auth/Type/Database.php exist?

注意：Database.php确实存在于models \ Sahara \ Auth \ Type目录中！

立即看起来很奇怪的是'/'和'\'之间的交换路径，但试图强制反对（我使用的是Windows机器）似乎没有任何影响。

提前致谢！

Answer 1

PATH_SEPARATOR是;在Windows上，以及：在其他操作系统上。它用于分割多个路径，而不是（子）目录和文件名。

变化：

if (file_exists($path . PATH_SEPARATOR . $file));

要：

if (file_exists($path . '/' . $file));

这将无处不在。

Answer 2

好的两件事：

使用DIRECTORY_SEPARATOR and not PATH_SEPARATOR。
使用realpath()修复任何路径怪异。

如果有人感兴趣，我的自动加载器看起来像这样（不是ZF）：

<?php

namespace Application\Common;
/**
 * Autoloader class
 * This class will be responsible for autoloading of classes.
 */
class Autoloader {

    /** @var string $namespace  Namespace prefix for this instance */
    private $namespace;
    /** @var string $path       Path prefix for this instance */
    private $path;

    /**
     * @param string $namespace
     * @param string $path
     */
    public function __construct($namespace, $path) {
        $this->namespace = ltrim($namespace, "\\");
        $this->path      = rtrim($path, "/\\");
    }

    /**
     * Attempts to load a class.
     *
     * @param string $class The class name, including namespace.
     *
     * @return bool Success or fail based on class existence.
     */
    public function load($class) {
        $class = ltrim($class, "\\");
        //Check to see if class is from correct namespace defined by Autoloader instance.
        if (strpos($class, $this->namespace) === 0) {
            //Explode by namespace parts
            $namespace_parts = explode("\\", $class);
            //Class would be the last element, take it out and return it
            $class             = array_pop($namespace_parts);
            $namespace_parts[] = '';
            /* Build the directory path:
                The base path as defined in Autoloader
                The namespace parts, each a folder
                Parts of the class, separated by an underscore, become folders as well
            */
            $path = $this->path . DIRECTORY_SEPARATOR . implode(DIRECTORY_SEPARATOR, $namespace_parts);
            $path .= str_replace("_", DIRECTORY_SEPARATOR, $class) . ".php";
            $path = realpath($path);
            if (file_exists($path)) {
                require $path;
                return true;
            }
        }
        return false;
    }

    /**
     * Register the function.
     */
    public function register() {
        spl_autoload_register(array($this, "load"));
    }

    /**
     * Unregisters the function.
     */
    public function unregister() {
        spl_autoload_unregister(array($this), "load");
    }
}

使用：

//Application being the common namespace prefix.
//__DIR__."Application" being the base directory.
$autoloader = new Application\Common\Autoloader("Application", __DIR__ . "Application");
$autoloader->register();

Answer 3

您的自动加载器需要在课堂上实际需要，所以您可能需要：

if (file_exists($path . PATH_SEPARATOR . $file))
{
    require $path . PATH_SEPARATOR . $file;
    return new $name();
}

PHP包含路径和路径分隔符混淆

3 个答案: