从名称空间中启动的Mustache.php - include()：未能打开流

Question

当使用简单的自动加载程序时，从名称空间中启动的Mustache.php webpage正确地呈现数据，但也返回关于包含其许多文件的失败警告的长列表。胡子是通过要求它的Autoloader.php来加载的，这是它的官方文档推荐的。

我发现有几个帖子(1，2)讨论了一个类似的问题。典型的解决方案是在\前面添加Mustache_Autoloader::register();，以便将其加载到全局命名空间中。然而，这似乎对我不起作用。

同样的警告列表是在(5.5.26)和成熟的PHP服务器(7.1.9)上生成的。

最小的代码在下面。

目录结构：

.
│   index.php
└───app
    ├───controllers
    │   └───webpage
    │           home.php
    └───vendor
        └───Mustache
                Autoloader.php

index.php含量

function autoloader($class)
{
    include($_SERVER['DOCUMENT_ROOT'] . '/app/controllers/' . $class . '.php');
}
spl_autoload_register('autoloader');

new \webpage\home;

home.php含量

namespace webpage;

class home
{
    function __construct()
    {
        require $_SERVER['DOCUMENT_ROOT'] . '/app/vendor/Mustache/Autoloader.php';

        \Mustache_Autoloader::register();

        $mustache = new \Mustache_Engine();

        echo $mustache->render('Hello {{planet}}', array('planet' => 'World!'));
    }
}

注意，在输出的最底部是一个正确呈现的字符串"Hello“。

Warning: include(D:/project/app/controllers/Mustache_Engine.php): failed to open stream: No such file or directory in D:\project\index.php on line 5

Warning: include(): Failed opening 'D:/project/app/controllers/Mustache_Engine.php' for inclusion (include_path='.;D:\project;C:\Program Files (x86)\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\php\sdk') in D:\project\index.php on line 5

Warning: include(D:/project/app/controllers/Mustache_Loader_StringLoader.php): failed to open stream: No such file or directory in D:\project\index.php on line 5

Warning: include(): Failed opening 'D:/project/app/controllers/Mustache_Loader_StringLoader.php' for inclusion (include_path='.;D:\project;C:\Program Files (x86)\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\php\sdk') in D:\project\index.php on line 5

Warning: include(D:/project/app/controllers/Mustache_Loader.php): failed to open stream: No such file or directory in D:\project\index.php on line 5

Warning: include(): Failed opening 'D:/project/app/controllers/Mustache_Loader.php' for inclusion (include_path='.;D:\project;C:\Program Files (x86)\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\php\sdk') in D:\project\index.php on line 5

Warning: include(D:/project/app/controllers/Mustache_Cache_NoopCache.php): failed to open stream: No such file or directory in D:\project\index.php on line 5

Warning: include(): Failed opening 'D:/project/app/controllers/Mustache_Cache_NoopCache.php' for inclusion (include_path='.;D:\project;C:\Program Files (x86)\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\php\sdk') in D:\project\index.php on line 5

Warning: include(D:/project/app/controllers/Mustache_Cache_AbstractCache.php): failed to open stream: No such file or directory in D:\project\index.php on line 5

Warning: include(): Failed opening 'D:/project/app/controllers/Mustache_Cache_AbstractCache.php' for inclusion (include_path='.;D:\project;C:\Program Files (x86)\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\php\sdk') in D:\project\index.php on line 5

Warning: include(D:/project/app/controllers/Mustache_Cache.php): failed to open stream: No such file or directory in D:\project\index.php on line 5

Warning: include(): Failed opening 'D:/project/app/controllers/Mustache_Cache.php' for inclusion (include_path='.;D:\project;C:\Program Files (x86)\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\php\sdk') in D:\project\index.php on line 5

Warning: include(D:/project/app/controllers/Mustache_Logger.php): failed to open stream: No such file or directory in D:\project\index.php on line 5

Warning: include(): Failed opening 'D:/project/app/controllers/Mustache_Logger.php' for inclusion (include_path='.;D:\project;C:\Program Files (x86)\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\php\sdk') in D:\project\index.php on line 5

Warning: include(D:/project/app/controllers/Mustache_Parser.php): failed to open stream: No such file or directory in D:\project\index.php on line 5

Warning: include(): Failed opening 'D:/project/app/controllers/Mustache_Parser.php' for inclusion (include_path='.;D:\project;C:\Program Files (x86)\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\php\sdk') in D:\project\index.php on line 5

Warning: include(D:/project/app/controllers/Mustache_Tokenizer.php): failed to open stream: No such file or directory in D:\project\index.php on line 5

Warning: include(): Failed opening 'D:/project/app/controllers/Mustache_Tokenizer.php' for inclusion (include_path='.;D:\project;C:\Program Files (x86)\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\php\sdk') in D:\project\index.php on line 5

Warning: include(D:/project/app/controllers/Mustache_Compiler.php): failed to open stream: No such file or directory in D:\project\index.php on line 5

Warning: include(): Failed opening 'D:/project/app/controllers/Mustache_Compiler.php' for inclusion (include_path='.;D:\project;C:\Program Files (x86)\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\php\sdk') in D:\project\index.php on line 5

Warning: include(D:/project/app/controllers/Mustache_Template.php): failed to open stream: No such file or directory in D:\project\index.php on line 5

Warning: include(): Failed opening 'D:/project/app/controllers/Mustache_Template.php' for inclusion (include_path='.;D:\project;C:\Program Files (x86)\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\php\sdk') in D:\project\index.php on line 5

Warning: include(D:/project/app/controllers/Mustache_Context.php): failed to open stream: No such file or directory in D:\project\index.php on line 5

Warning: include(): Failed opening 'D:/project/app/controllers/Mustache_Context.php' for inclusion (include_path='.;D:\project;C:\Program Files (x86)\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\php\sdk') in D:\project\index.php on line 5

Warning: include(D:/project/app/controllers/Mustache_HelperCollection.php): failed to open stream: No such file or directory in D:\project\index.php on line 5

Warning: include(): Failed opening 'D:/project/app/controllers/Mustache_HelperCollection.php' for inclusion (include_path='.;D:\project;C:\Program Files (x86)\Google\Cloud SDK\google-cloud-sdk\platform\google_appengine\php\sdk') in D:\project\index.php on line 5
Hello World!

你知道怎么解决吗？谢谢。

Answer 1

PHP在尝试加载一个文件时，按顺序尝试每个注册的自动加载程序。一旦一个自动加载程序成功加载该文件，它将停止尝试。在你的例子中，它是在index.php中尝试自动加载器，然后再尝试胡子自动加载器。

index.php中的自动加载器太天真了：

function autoloader($class)
{
    include($_SERVER['DOCUMENT_ROOT'] . '/app/controllers/' . $class . '.php');
}
spl_autoload_register('autoloader');

这段代码盲目地用它指定的类名调用include，不管这样的文件是否存在。您可以从输出中看到，它试图在controllers中为胡子使用的每个类包含一个文件。

代码不会完全失败，因为在自动加载程序无法加载该文件之后，PHP将尝试下一个注册的自动加载程序(与胡子一起附带的自动加载程序)，并成功地加载必要的文件。

您可以通过在包含该文件之前检查该文件的存在来修复自动加载程序代码。您还可以在尝试加载文件之前先检查类上的webpage\名称空间前缀，从而使其更加智能。