PHP spl_autoload_register什么都不做

Question

i'm updating my code and trying to use spl_autoload_register but IT SIMPLY DOESN'T WORK!!! I'm using PHP 5.3.8 - Apache 2.22 on Centos / Ubuntu / Win7 and trying to echo something but i get nothing instead... have been trying to make it work for the last 3 hours with no result... this is driving me mad!!!

class ApplicationInit {
    // Constructor
    public function __construct() {
        spl_autoload_register(array($this, 'classesAutoloader'));
        echo 'construct working...!';
    }

    // Autoloading methods
    public function classesAutoloader($class) {
        include 'library/' . $class . '.php';

        echo 'autoload working...!';
    }
}

first echo from __construct works but the "classesAutoloader" doesn't work at all, this class is defined in a php file within a folder and i'm calling it from index.php like follows:

define('DS', DIRECTORY_SEPARATOR);
define('ROOT', getcwd() . DS);
define('APP', ROOT . 'application' . DS);

// Initializing application
require(APP.'appInit.php');
$classAuto = new ApplicationInit();

any help is truly appreciated, thanks in advance!

Answer 1

It seems like you're doing the wrong thing. The function that you pass to spl_autoload_register is what's responsible for loading the class file.

Your code is calling

$classAuto = new ApplicationInit();

but by that time, ApplicationInit is already loaded so the autoload function doesn't get called

A more logical way would be for you to to call

spl_autoload_register(function($class){
    include 'library/' . $class . '.php';
});

Then when you call

$something = new MyClass();

And the MyClass is not defined, then it will call your function to load that file and define the class.