SplClassLoader.php

<?php

class SplClassLoader
{
  protected
    $includePath        = null,
    $namespace          = null,
    $extension          = '.php',
    $namespaceSeparator = '\\';

  public function __construct($includePath = null, $namespace = null)
  {
    $this->includePath = $includePath;
    $this->namespace = $namespace;

    $this->register();
  }

  public function setNamespaceSeparator($namespaceSeparator)
  {
    $this->namespaceSeparator = $namespaceSeparator;
  }

  public function getNamespaceSeparator()
  {
    return $this->namespaceSeparator;
  }

  public function setIncludePath($includePath)
  {
    $this->includePath = $includePath;
  }

  public function getIncludePath()
  {
    return $this->includePath;
  }

  public function setFileExtension($extension)
  {
    $this->extension = $extension;
  }

  public function getFileExtension($extension)
  {
    return $this->extension;
  }

  public function register()
  {
    spl_autoload_register(array($this, 'loadClass'));
  }

  public function unregister()
  {
    spl_autoload_unregister(array($this, 'loadClass'));
  }

  public function loadClass($class)
  {
    if (null === $this->namespace || 0 === strpos($class, $this->namespace.$this->namespaceSeparator))
    {
      $includePath = $this->includePath ? $this->includePath.'/' : '';
      require $includePath.str_replace($this->namespaceSeparator, '/', $class).$this->extension;
    }
  }
}