Wordpress PHP Combine two wp queries of different post types - merge 2 arrays and sort by date

wp-combine-two-arrays-post-types-re-order-and-render.php

<?php

// first query
$first_ids = get_posts( array(
  'post_status'=> 'publish',
  'orderby'   => 'date',
  'post_type'=> 'press',
  'posts_per_page'  => -1,
  'order' => 'DESC',
));


// second query
$second_ids = get_posts( array(
  'orderby'   => 'date',
  'post_type'=> 'post',
  'category_name'=>'highlights',
  'posts_per_page'  => -1,
  'order' => 'DESC',
));

// merging arrays using array_merge()
$posts = array_merge( $first_ids, $second_ids);

// sorting with usort()
usort($posts, function($post_a, $post_b) {
  return $post_b->post_date <=> $post_a->post_date;
});

// loop them with a for each
foreach($posts as $post){
// here ad your magic
the_title();
}
?>