Adding custom shortcodes to Contact Form 7

gistfile1.php

<?php
/*
Plugin Name: Contact Form 7 Post Title shortcode
Plugin URI:
Description: Use in form: [post_title thetitle] - use in email (to get value): [thetitle] 
Version: 2014.04.07
Author: khromov
Author URI: http://profiles.wordpress.org/khromov/
License: GPL2
*/

add_action('plugins_loaded', function()
{
	if(function_exists('wpcf7_add_shortcode'))
	{
		/** Post title shortcode **/
		wpcf7_add_shortcode('post_title', function($tag)
		{
			if (!is_array($tag)) return '';

			$name = $tag['name'];
			if (empty($name)) return '';

			$html = '<input type="hidden" name="' . $name . '" value="'. get_the_title() .'" />';
			return $html;
		}, true);
	}
});