polashrp

add_filter( 'post_type_link', 'my_post_type_link', 10, 3);
function my_post_type_link($permalink, $post, $leavename) {

	if  ($post->post_type == 'my-post-type') {
		$meta = get_post_meta($post->ID, '_my-post-meta', true);
		if (isset($meta) && !empty($meta)) 
			$permalink = home_url( "my-friendly-url/" . $meta . "/" . $post->post_name . "/");
	}

	return $permalink;

polashrp

In this article I'm going to walk you through process of creating Wordpress plugins. First I'm going to talk about some of the basic concepts in Wordpress plugin development like the actions, hooks, and API's that makes up Wordpress. Then were going to build a plugin where we apply some of the concepts and best practices in developing Wordpress plugins.

###Prerequisites

In order to fully benefit from this tutorial you should have a basic knowledge on PHP. As Wordpress is running on PHP and most of the code that we will be writing will be on PHP. A little bit of knowledge on HTML, CSS and JavaScript is also helpful but not required for this tutorial.