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Require a featured image before you can publish post

If you would like to require that all posts have a featured image before they can be published add this snippet to the functions.php of your wordpress theme. When you try and publish a post without a featured image you get an admin message "You must select Featured Image. Your Post is saved but it can not be published." Great way to ensure all your posts have a featured image before they are publish.

Code Snippet:


add_action('save_post', 'wpds_check_thumbnail');
add_action('admin_notices', 'wpds_thumbnail_error');

function wpds_check_thumbnail($post_id) {

// change to any custom post type
if(get_post_type($post_id) != 'post')
return;

if ( !has_post_thumbnail( $post_id ) ) {
// set a transient to show the users an admin message
set_transient( “has_post_thumbnail'', “no'' );
// unhook this function so it doesn't loop infinitely
remove_action('save_post', 'wpds_check_thumbnail');
// update the post set it to draft
wp_update_post(array('ID' => $post_id, 'post_status' => 'draft'));

add_action('save_post', 'wpds_check_thumbnail');
} else {
delete_transient( “has_post_thumbnail'' );
}
}

function wpds_thumbnail_error()
{
// check if the transient is set, and display the error message
if ( get_transient( “has_post_thumbnail'' ) == “no'' ) {
echo “<div id='message' class='error'><p><strong>You must select Featured Image. Your Post is saved but it can not be published.</strong></p></div>'';
delete_transient( “has_post_thumbnail'' );
}

}

Comments  Leave a Reply

  1. Thanks

  2. Hey Kevin. I am creating a custom functions plugin where I added this snippet and it seems to work fine until I go to delete a draft/post. I am not able to delete as it just gives me the “You must select a Featured Image. Your Post is saved but it can not be published.” I have to remove the code to be able to delete a post.

    1. I put the function (wpds_check_thumbnail)’s code inside of:

      if ( ‘trash’ != get_post_status( $post_id ) ) { //Code here }

  3. Great! This is quite useful for me at the moment. Is this adjustable to only work on a certain post-type or category?

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