WordPress.org

1. duncmorley
   Member
   Posted 1 year ago #

   I am looking to write a function that detects if a feature image has been added to a post, and to add a class if it has. I have written this so far.

   // Add a class to post_class if feature image is detected
   function check_image( $class ) {
   	if ( has_post_thumbnail() ) {
   		$class[] = 'feature-image';
   	}
   	return $class;
   	}
   add_filter('post_class', 'check_image');
   // end ---

   This actually works but I am getting an error "Missing argument 1 for check_image()". Any ideas?? I am quite new to writing WordPress functions so go easy :-)

2. duncmorley
   Member
   Posted 1 year ago #

   Fixed it. The code that works is below:

   // Add a class to post_class if feature image is detected
   function check_image( $class = '' ) {
   	if ( has_post_thumbnail() ) {
   		$class[] = 'feature-image';
   	}
   	return $class;
   	}
   add_filter('post_class', 'check_image');
   // end ---

Topic Closed

This topic has been closed to new replies.