php - autoload not working with static method - php

Question

I using spl_autoload_register to autoload class like
My Structure
index.php
Module\Autoloader.php
Module\MyClass.php
Test\test.php
in index.php file
require_once ("Module\Autoloader.php");
use Module\MyClass;
include 'Test\test.php';
in Module\Autoloader.php file
class Autoloader {
static public function loader($className) {
$filename = __DIR__."/" . str_replace("\\", '/', $className) . ".php";
echo $filename.'<br>';
if (file_exists($filename)) {
include($filename);
}
}
}
spl_autoload_register('Autoloader::loader');
in Module\MyClass.php file
namespace Module;
class MyClass {
public static function run() {
echo 'run';
}
}
in Test\test.php file
MyClass::run();
But it has error
Fatal error: Uncaught Error: Class 'MyClass' not found in ..\Test\test.php
How to fix that thank

Answer 1

your issue is that you prepend __DIR__
__DIR__ is based on where the file from which it gets called resides:
__DIR__
The directory of the file. If used inside an include, the directory of the included file is returned. This is equivalent to dirname(__FILE__). This directory name does not have a trailing slash unless it is the root directory.
http://php.net/manual/en/language.constants.predefined.php
So because your autoloader routine resides in ./Module/
__DIR__ will not return / when called from index.php but Module, making your finished classpath Module/Module/MyClass.php which obviously can't be found.
Either use another means of prepending the directory, like a predetermined list, use the first part of the namespace (so just ditch the __DIR__) or move the classes to location relative to directory in which your include file resides.

Answer 2

Your autoloader is inside the Module dir so it will apppend an extra "Module" when you try to append "DIR" to the class full name. The file location will be something like this:
../Module/Module/MyClass.php
Try to move your autoloader the same dir as index.php or change it as the following:
<?php
class Autoloader {
static public function loader($className) {
$filename = __DIR__ . DIRECTORY_SEPARATOR . '..' . DIRECTORY_SEPARATOR .
str_replace("\\", DIRECTORY_SEPARATOR, $className) . ".php";
if (file_exists($filename)) {
include($filename);
} else {
echo "$filename not found!\n";
}
}
}
spl_autoload_register('Autoloader::loader');