You are getting that because the $post
variable isn’t set.
You’ll need to call global $post
at the beginning of your function.
function custom_content_filter_the_content( $content ) {
global $post;
...
You are getting that because the $post
variable isn’t set.
You’ll need to call global $post
at the beginning of your function.
function custom_content_filter_the_content( $content ) {
global $post;
...