從命名空間內啟動Mustache.php-include（）：無法打開流

Question

當使用簡單的自動加載器時，從命名空間webpage內啟動的Mustache.php會正確呈現數據，但還會返回一長串關於失敗的警告列表，其中包含許多文件失敗。 根據官方文檔的建議，必須通過安裝Autoloader.php來加載Moustache。

我發現幾個職位（ 1 ， 2 ），該討論類似的問題。 典型的解決方案是在Mustache_Autoloader::register();加\\ Mustache_Autoloader::register(); 加載到全局名稱空間中。 但是，這似乎對我不起作用。

在Google Cloud PHP開發服務器（5.5.26）和成熟的PHP服務器（7.1.9）上都會生成相同的警告列表。

最小代碼如下。

目錄結構：

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

index.php內容：

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

new \webpage\home;

home.php內容：

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，在輸出的最底部是正確呈現的字符串“ Hello World”。

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!

您知道如何解決嗎？ 謝謝。

Answer 1

PHP嘗試依次嘗試注冊的每個自動加載器，同時嘗試加載文件。 一旦一個自動加載器成功加載文件，它將停止嘗試。 在您的情況下，先嘗試使用index.php的自動加載器，然后再嘗試Mustache自動加載器。

而且index.php的自動加載器太幼稚了：

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

不管是否存在這樣的文件，此代碼都盲目調用， include給定的任何類名。 從輸出中可以看到，它正在嘗試將controllers的文件包含在Mustache使用的每個類中。

代碼不會完全失敗，因為在自動加載器無法加載文件之后，PHP會嘗試下一個注冊的自動加載器（Mustache隨附的自動加載器），並成功加載了必要的文件。

您可以通過在添加文件之前檢查文件是否存在來修復自動加載器代碼。 您還可以通過在嘗試加載文件之前檢查類上的webpage\\名稱空間前綴來使其更聰明。