如何使用单个实例在自动加载中注册路径. [英] How to register path in autoload using a single instance.

问题描述

很抱歉，标题含糊不清，但我试图找到一些更好的替代方法，以不必多次调用Autoloader类和register方法来映射类路径，如下所示.

Sorry about the vague title, but I am trying to find some better alternatives to having to call an Autoloader class, and the register method multiple times, to map class paths as seen below.

$ClassLoader = new Autoloader\Loader(__DIR__.'/path/to/someclass');
$ClassLoader->register();

$ClassLoader = new Autoloader\Loader(_DIR__.'/path/to/anotherclass');
$ClassLoader->register();

$ClassLoader = new Autoloader\Loader(__DIR__.'/path/to/anotherclass');
$ClassLoader->register();

$ClassLoader = new Autoloader\Loader(__DIR__.'/path/to/anotherclass');
$ClassLoader->register();

$ClassLoader = new Autoloader\Loader(__DIR__.'/path/to/anotherclass');
$ClassLoader->register();

这持续约50行，我想知道如何用简单的几行解决方案来处理自动加载类.我显然可以向构造函数注入数组:

This goes on and on for about 50 lines, and I would like to know how I can handle the autoloading classes with simple few lines solution. I can obviously inject an array, to the constructor:

 $ClassLoader = new Autoloader\Loader( ['paths'=>[
                     '/path/to/class/', 
                     '/path/to/anotherclass',
                     '/path/to/anotherclass'
 ]);
 $ClassLoader->register();

但是，我不确定从OOP良好实践的角度来看是否建议至少使用此方法.

But, I am not sure if this method is recommended at-least from OOP good practice point of view.

推荐答案

也许这就是您想要的. 对于包含类的每个目录，运行::add.

Perhaps this is what you are looking for. For each directory that contains your classes run ::add.

namespace ClassLoader;

class Loader
{
    protected $directories = array();


    public function __construct()
    {
        spl_autoload_register([$this, 'load']);
    }

    public function add($dir)
    {
        $this->directories[] = rtrim($dir, '/\\');
    }

    private function load($class)
    {
        $classPath = sprintf('%s.php', str_replace('\\', '/', $class));

        foreach($this->directories as $dir) {
            $includePath = sprintf('%s/%s', $dir, $classPath);

            if(file_exists($includePath)) {
                require_once $includePath;
                break;
            }
        }
    }
}

$loader = new Loader();

$loader->add(__DIR__.'/src');
$loader->add(__DIR__.'/vendor');

use Symfony\Component\Finder\Finder;

$finder = new Finder(); 
// Included /var/www/test/vendor/Symfony/Component/Finder/Finder.php
// I put the Symfony components in that directory manually for this example.

print_r($finder);

它实际上与作曲家相同，只是适应性或性能较低.

It is effectively the same as with composer though, just less adaptive or performant.

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