Delete orhaned attachments which are not attached to any post, page or cpt [Wordpress]

delete_unattached_attachments.php

function delete_unattached_attachments(){
	$attachments = get_posts( array(
	'post_type' => 'attachment',						
	'numberposts' => -1,	 	  								
	'fields' => 'ids', 
	'post_parent' => 0,
		));									
		if ($attachments) {		 		
			foreach ($attachments as $attachmentID){
				$attachment_path = get_attached_file( $attachmentID); 
				//Delete attachment from database only, not file
				$delete_attachment = wp_delete_attachment($attachmentID, true);
				//Delete attachment file from disk
				$delete_file = unlink($attachment_path);					
			}					
		}				
}

Thanks for posting this! One revision I'd suggest is to use wp_delete_file() instead of unlink() on line 14. wp_delete_file() filters the input and makes it more reliable/less dangerous: https://developer.wordpress.org/reference/functions/wp_delete_file/

Thanks for this. A use case for you: with RSS feed aggregators this script is essential as when you scale you need to clean the tail of the unwanted post you syndicated. Would be nice to have it follow some patterns to avoid removing files from Elementor as now it could happen.