<?php

// extend PostType class and create your own post type
class MyPostType extends \WPPostType\PostType
{
	function __construct()
	{
		// set post type name: 'my-post-type'
		// - archive page: yoursite.com/my-post-type
		// - single page: yoursite.com/my-post-type/post-slug
		parent::__construct('my-post-type', array(
			// second argument of `register_post_type()`
			// see: http://codex.wordpress.org/Function_Reference/register_post_type
			'supports' => array('title', 'editor'),
			'has_archive' => true
		));
	}

	// compose edit screen
	public function onAddMetaBoxes()
	{
		// create 'Info' box
		add_meta_box(
			'my-post-type-info',
			'Info',
			array($this, 'addMetaInfo'),
			$this->name
		);
	}

	public function addMetaInfo($post)
	{
		// input tags for custom fields: 'nickname' and 'birth_year'
		?>
		<p>
			Nickname<br>
			<input type="text" name="nickname" value="<?php echo esc_attr($post->nickname) ?>"></input><br>
		</p>
		<p>
			Birth Year<br>
			<input type="number" name="birth_year" value="<?php echo esc_attr($post->birth_year) ?>"></input>
		</p>
		<?php
	}

	public function onCheckedSavePost($post_id, $post)
	{
		$params = stripslashes_deep($_POST);

		// save custom values in a custom way
		if (isset($params['nickname'])) {
			$value = trim($params['nickname']);
			update_post_meta($post_id, 'nickname', $value);
		}
		if (isset($params['birth_year'])) {
			$value = intval($params['birth_year']);
			update_post_meta($post_id, 'birth_year', $value);
		}
	}
}

// register 'my-post-type'
new MyPostType();