DiviAreaItem.addFilter(hook, callback, priority, context)
Register a new hook that only handles filters of this Area. Use
DiviAreaItem.applyFilters() to apply an Area filter.
DiviArea.addFilter() function for more details on how filters work.
- (string, required) The hook name, without an area-suffix.
- (function, required) The callback function to execute when the filter is applied. The return value of the callback function defines the new (aka “filtered”) value.
- (int, optional) Used to specify the order, in which callbacks are executed. Callbacks with a lower priority are called first.
- (object, optional) Used to define a custom value for the scope-variable
thisin the callback function.
The function does not return anything.