Using WordPress ‘has_filter()’ PHP function
Checks if any filter has been registered for a hook.
Checks if any filter has been registered for a hook.
The `has_custom_header()` function in WordPress verifies whether a custom header is set for the current theme or not
Checks if the current post has any of given category.
Checks if any action has been registered for a hook.
The `global_terms_enabled()` function in WordPress determines if global terms are enabled
Retrieve the first name of the author of the current post.
Maintains a canonical list of terms by syncing terms created for each blog with the global terms table.
Retrieves user interface setting value based on setting name.
Perform the query to get the §metavalues array(s) needed by _fill_user and _fill_many_users