<?php
class gridView
{  
  protected $_dir   = 'templates/';
  protected $_vars  = array();
  
  function __construct( $dir = null )
  {
    if ( $dir !== null )
      $this -> _dir = $dir;
  }
  
  public function render( $file )
  {
    if ( file_exists( $this -> _dir . $file . '.php' ) )
    {
      ob_start();
        include $this -> _dir . $file . '.php';
        $out = ob_get_contents();
      ob_end_clean();
      
      return $out;
    }
    else
      throw new Exception( 'No template file ' . $file . ' present in directory ' . $this -> _dir );
  }
  
  public function __set( $name, $value )
  {
    $this -> _vars[ $name ] = $value;
  }
  
  public function __get( $name )
  {
    return $this -> _vars[ $name ];
  }
}