SimpleRouter/Route.php

<?PHP

class Route{
	
	private static $routes = Array();
	private static $pathNotFound = null;
  private static $methodNotAllowed = null;

	public static function add($expression, $function, $method = 'get'){
		array_push(self::$routes,Array(
			'expression' => $expression,
			'function' => $function,
      'method' => $method
		));
	}
  
	public static function pathNotFound($function){
		self::$pathNotFound = $function;
	}
  
  public static function methodNotAllowed($function){
		self::$methodNotAllowed = $function;
	}
	
	public static function run($basepath = '/'){
		  
    // Parse current url
		$parsed_url = parse_url($_SERVER['REQUEST_URI']);//Parse Uri

		if(isset($parsed_url['path'])){
			$path = $parsed_url['path'];
		}else{
			$path = '/';
		}
    
    // Get current request method
    $method = $_SERVER['REQUEST_METHOD'];
    
		$path_match_found = false;
    
    $route_match_found = false;
		
		foreach(self::$routes as $route){

      // If the method matches check the path
      
      // Add basepath to matching string
      if($basepath!=''&&$basepath!='/'){
        $route['expression'] = '('.$basepath.')'.$route['expression'];
      }
      
      // Add 'find string start' automatically
      $route['expression'] = '^'.$route['expression'];
 
      // Add 'find string end' automatically
      $route['expression'] = $route['expression'].'$';
      
      // echo $route['expression'].'<br/>';
      
      // Check path match	
      if(preg_match('#'.$route['expression'].'#',$path,$matches)){
        
        $path_match_found = true;
        
        // Check method match
        if(strtolower($method) == strtolower($route['method'])){
        
          array_shift($matches);// Always remove first element. This contains the whole string
          
          if($basepath!=''&&$basepath!='/'){
            array_shift($matches);// Remove basepath
          }
          
          call_user_func_array($route['function'], $matches);
          
          $route_match_found = true;
          
          // Do not check other routes
          break;
        }
			}
		}
		
    // No matching route was found
		if(!$route_match_found){
			
      // But a matching path exists
      if($path_match_found){
        header("HTTP/1.0 405 Method Not Allowed");
        if(self::$methodNotAllowed){
          call_user_func_array(self::$methodNotAllowed, Array($path,$method));
        }
      }else{
        header("HTTP/1.0 404 Not Found");
        if(self::$pathNotFound){
          call_user_func_array(self::$pathNotFound, Array($path));
        }
      }
 
		}
		
	}
	
}