WP_Plugin class concept

plugin-file.php

<?php
/*
Plugin Name: WP_Plugin class test
Description: Tosting things out, again.
Author: Konstantin Kovshenin
Version: 1.0
Author URI: http://kovshenin.com
*/

class WP_Plugin {
	function __construct() {
		add_filter( 'all', array( $this, 'a_method_name_somebody_would_never_guess' ) );
	}
	
	function a_method_name_somebody_would_never_guess() {
		$args = func_get_args();
		$tag = array_shift( $args );
		$method = '__' . $tag;
		
		if ( is_callable( array( $this, $method ) ) ) {
			add_filter( $tag, array( $this, $method ), 10, count( $args ) );
		}
	}
}

// Here's an example of a plugin that would benefit from the above
class Some_Plugin extends WP_Plugin {
	
	// Will filter the_title
	function __the_title( $title ) {
		return $title . '123';
	}
	
	// Will filter the_content
	function __the_content( $content ) {
		return $content . ' Add more content.';
	}
	
	// Will run during wp_footer
	function __wp_footer() {
		echo "I'm in the footer!";
	}
}

$some_plugin = new Some_Plugin;
?>