PHP - most lightweight psr-0 compliant autoloader

Question

I have a tiny application that i need an autoloader for. I could easily use the symfony2 class loader but it seems like overkill.

Is there a stable extremely lightw

Answer 1

An exact equivalent of the answer @hakre provided, just shorter:

function autoload($class) {
  $path = null;

  if (($namespace = strrpos($class = ltrim($class, '\\'), '\\')) !== false) {
    $path .= strtr(substr($class, 0, ++$namespace), '\\', '/');
  }

  require($path . strtr(substr($class, $namespace), '_', '/') . '.php');
}

You can also set the base directory by changing $path = null; to another value, or just do like this:

$paths = array
(
    __DIR__ . '/vendor/',
    __DIR__ . '/vendor/phunction/phunction.php',
);

foreach ($paths as $path)
{
    if (is_dir($path) === true)
    {
        spl_autoload_register(function ($class) use ($path)
        {
            if (($namespace = strrpos($class = ltrim($class, '\\'), '\\')) !== false)
            {
                $path .= strtr(substr($class, 0, ++$namespace), '\\', '/');
            }

            require($path . strtr(substr($class, $namespace), '_', '/') . '.php');
        });
    }

    else if (is_file($path) === true)
    {
        require($path);
    }
}