I am currently working in a project in wordpress.

Here i have to get all posts from two custom post types namely pt1, pt2.

But here i want to display posts with random post type(pt1, pt2).

Example)

I want to display first post from pt1, next from pt2 and again pt1 and next pt2 and so on...

How can i do this. Any help? This is the code:

$args = array(

'posts_per_page'   => 5,    

'orderby'          => 'post_date',

'order'            => 'DESC',   

'post_type'        => array('pt1', 'pt2'),  

'post_status'      => 'publish'

 ); 

$posts = get_posts( $args );

$num=1;

foreach($posts as $post) {

    if( $num % 2 == 0 )             

        echo $post->post_title.$post->post_type;

    else    

        echo $post->post_title.$post->post_type;

    $num++;

}