Question

I am developing a new application from scratch and I need to autoload files recursively.
However, I need to use namespace like Zend Framework.

For example, LibraryName_Http_Request will load LibraryName/Http/Request.php file.
Whatsoever I’ve tried, I can only use LibraryName_Http_Request class if I name the file LibraryName_Http_Request.php.

I can’t figure out how to change my code so that i can load class files in the same Zend fashion…

Here is my code:

class Autoloader
{

    public function __construct()
    {
        spl_autoload_register( array( $this, 'autoload' ) );
    }

    public function autoload( $class )
    {
        $iterator = new RecursiveDirectoryIterator( LIBRARY_PATH );

        foreach( new RecursiveIteratorIterator( $iterator ) as $file=>$meta ) {

            if( ( $class . '.php' ) === $meta->getFileName() ) {

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

        unset( $iterator, $file );
    }

}

Answer 1

You should check out the PSR-0 which does what you want. You can find a link to PSR-0 loader implementation at the end of the recommendation.

---

Update: Since you are using PHP 5.2, the above loader doesn’t fully fit to your needs. Here is a simple autoloader I wrote based on PSR-0 without namespace support:

class SimpleClassLoader
{
    /**
     * Installs this class loader on the SPL autoload stack.
     */
    public function register()
    {
        spl_autoload_register(array($this, 'loadClass'));
    }

    /**
     * Uninstalls this class loader from the SPL autoloader stack.
     */
    public function unregister()
    {
        spl_autoload_unregister(array($this, 'loadClass'));
    }

    /**
     * Loads the given class or interface.
     *
     * @param string $className The name of the class to load.
     * @return void
     */
    public function loadClass($className)
    {
        require str_replace('_', DIRECTORY_SEPARATOR, $className) . '.php';
    }
}

Then register the loader:

$loader = new SimpleClassLoader();
$loader->register();

Now referencing LibraryName_Http_Request will include LibraryName/Http/Request.php.