PHP5 AutoLoader SPL_AutoLoad 失败

Question

我将下面的代码作为自动加载类，但是 clean 方法似乎根本不起作用，并且它总是依赖于 dirty 方法。

我是否错误地使用了 spl_autoload ？如果是这样，正确（更好）的方法是什么？这是否效率低下，如何改进？

不过，在使用此方法时，我总是得到诸如底部之类的输出，并且在某些情况下，它只是找不到该类，但不会抛出任何错误我已将显示错误设置为 1 并已检查错误日志但完全丢失了。

代码初始化为

require "vendor/AutoLoader.class.php";
self::setGlobal("autoloader", AutoLoader::init());

类如下：

public static $instance;
private $_src=array('vendor/', 'lib/', '');
private $_sub=array('base/', '');
private $_ext=array('.php', 'class.php', 'lib.php');

/* initialize the autoloader class */
public static function init(){
    if(self::$instance==NULL){
        self::$instance=new self();
    }
    return self::$instance;
}

/* put the custom functions in the autoload register when the class is initialized */
private function __construct(){
    spl_autoload_register(array($this, 'clean'));
    spl_autoload_register(array($this, 'dirty'));
}

/* the clean method to autoload the class without any includes, works in most cases */
private function clean($class){
    $class=str_replace('_', '/', $class);
    spl_autoload_extensions(implode(',', $this->_ext));
    foreach($this->_src as $resource){
      foreach($this->_sub as $sub){
        echo 'Trying to load ', $class, ' via ', __METHOD__, "()<br />";
        set_include_path(pegFramework::getGlobal("baseDir") . $resource.$sub);
        spl_autoload($class);
        if(class_exists($class)) {
          echo 'Found and clean included '.$class.' in '.$resource.$sub."<br />";
          break 2;
        }
      }
    }
}

/* the dirty method to autoload the class after including the php file containing the class */
private function dirty($class){
    global $docroot;
    $class=str_replace('_', '/', $class);
    foreach($this->_src as $resource){
        foreach($this->_ext as $ext){
          foreach($this->_sub as $sub){
            echo 'Trying to load ', $class, ' via ', __METHOD__, "()<br />";
            if(@include(pegFramework::getGlobal("baseDir") . $resource . $sub. $class . $ext)) {
              echo 'Found and dirty included '.$class.' as '.$resource . $sub. $class . $ext."<br />";
              break 3;
            }
          }
        }
    }
    spl_autoload($class);
}

---

Trying to load pegDatabase via pegAutoloader::clean()
...snip...
Trying to load pegDatabase via pegAutoloader::clean()
Trying to load pegDatabase via pegAutoloader::dirty()
Trying to load pegDatabase via pegAutoloader::dirty()
Trying to load basepegDatabase via pegAutoloader::clean()
...snip...
Trying to load basepegDatabase via pegAutoloader::clean()
Trying to load basepegDatabase via pegAutoloader::dirty()
Found and dirty included basepegDatabase as vendor/base/basepegDatabase.php
Found and dirty included pegDatabase as vendor/pegDatabase.php
Trying to load pegRequest via pegAutoloader::clean()
...snip...
Trying to load pegRequest via pegAutoloader::clean()
Trying to load pegRequest via pegAutoloader::dirty()
Trying to load pegRequest via pegAutoloader::dirty()
Found and dirty included pegRequest as vendor/pegRequest.php
Trying to load pegFacebook via pegAutoloader::clean()
...snip...
Trying to load pegFacebook via pegAutoloader::clean()
Trying to load pegFacebook via pegAutoloader::dirty()
...snip...
Trying to load pegFacebook via pegAutoloader::dirty()
Trying to load Facebook via pegAutoloader::clean()
Trying to load Facebook via pegAutoloader::clean()
...snip...
Trying to load Facebook via pegAutoloader::dirty()
Trying to load Facebook via pegAutoloader::dirty()
Trying to load Facebook via pegAutoloader::dirty()
...snip...
Trying to load Facebook via pegAutoloader::dirty()
Trying to load Facebook via pegAutoloader::dirty()
...snip...
Trying to load Facebook via pegAutoloader::dirty()

Answer 1

我认为是对 spl_autoload 的调用让你绊倒了。在php文档的注释中，我发现这个：

请注意，此函数会将其查找的类名小写，当找不到 Foo_Bar.php 时不要感到困惑

因此，使用 pegFacebook 或 Facebook 调用 spl_autoload code> 将触发对名为 pegfacebook.php 或 facebook.class.php 的文件的搜索。

不过，如果我是你，我会看看 Symfony 的 UniversalClassLoader 作为示例更简化的类加载处理。您可能可以调整它以使用特定的扩展，但我至少会考虑找到一种新的方法来处理这个问题。