Set featured image randomly from WordPress Database on post submission

1 comment

1. Here is a way:

   // listen for post being published
   add_action('publish_post', 'dreis_random_featured_image');
   
   function dreis_random_featured_image() {
       global $post;
   
       // find one random image    
       $args = array(
           'post_type' => 'attachment',
           'post_mime_type' => 'image',
           'post_status' => 'inherit',
           'posts_per_page' => 1,
           'orderby' => 'rand'
       );
   
       $random_image = new WP_Query($args);
   
       foreach($random_image as $image){
           // set as thumbnail
           set_post_thumbnail($post->ID, $image->ID);
       }
   
       // reset loop to avoid weirdness
       wp_reset_query();
   }
   

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