yarpp でカスタム投稿

新規

<?php 
yarpp_related(array(
	'post_type' => array('shop', 'mycustompost'),
	'show_pass_post' => false, // show password-protected posts
	'past_only' => false,
 'weight' => array(
        'body' => 2,
        'title' =>2, 
		 'tax' => array(
            'shop_cat' => 2,
        ))
//	    'order' => 'score DESC'//載せる順番　　　　
	// show only posts which were published before the reference post
	// 任意のテンプレートを利用する場合指定
	//'template' => 'yarpp-template-xxxxxx.php', // either the name of a file in your active theme or the boolean false to use the builtin template


	));
	
	?>

https://wordpress.org/plugins/yet-another-related-posts-plugin/faq/
http://blog.k-kansei.com/?p=728

個数未確認

テンプレートに記載

<?php 
yarpp_related(array(
	'post_type' => array('sekou', 'mycustompost'),
	'show_pass_post' => false, // show password-protected posts
	'past_only' => false, // show only posts which were published before the reference post
	// 任意のテンプレートを利用する場合指定
	//'template' => 'yarpp-template-xxxxxx.php', // either the name of a file in your active theme or the boolean false to use the builtin template


	));
	
	?>

https://wordpress.org/plugins/yet-another-related-posts-plugin/faq/