WordPress at a glance

Filters (hooks) (tag)

add_filter()

Attaches the specified PHP function to the specified filter hook. Thus, when the filter is triggered, the value will be filtered by the specified PHP function.

apply_filters()

Call the functions added to a filter hook.

current_filter()

Retrieve the name of the current filter or action.

doing_filter()

Retrieve the name of a filter currently being processed.

has_filter()

Check if any filter has been registered for a hook.

remove_all_filters()

Remove all of the hooks from a filter.

remove_filter()

Removes a function from a specified filter hook.