Simple Rtrim EE Plugin

gistfile1.txt

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

$plugin_info = array(
  'pi_name' 		=> 'Rtrim',
  'pi_version' 		=> '1.0',
  'pi_author'	 	=> 'Justin Kimbrell',
  'pi_author_url' 	=> 'http://objectivehtml.com/',
  'pi_description' 	=> 'Removes characters form the end of a string.',
  'pi_usage' 		=> Rtrim::usage()
);

class Rtrim
{
	public function __construct()
	{
		$this->EE =& get_instance();
		
		$string = $this->EE->TMPL->fetch_param('string');
		$trim	= $this->EE->TMPL->fetch_param('trim');
		
		if($string === FALSE)
			show_error('You must define a string parameter');
			
		if($trim === FALSE)
			show_error('You must define a trim parameter');
		
		$this->return_data = rtrim($string, $trim);
	}
	
	public static function usage()
	{
		ob_start();  ?>

		{exp:rtrim string="some string to trim/" trim="/"}

	<?php
		$buffer = ob_get_contents();
		ob_end_clean(); 

		return $buffer;
	}
}