bool apply_filters_ref_array ( string $event_name, array $args );
This construct fires the specified event, which means it loops through the event registry lookup table and calls each registered callback one-by-one. The callbacks are pre-registered for this event using
Note: this construct is identical to
apply_filters, except that all the arguments to be passed to the callbacks are wrapped into one array of arguments. Otherwise, the code is identical and it works the same.
- The name of the event (filter hook) to fire.
- Array of arguments which are to be passed to the registered callbacks.
Returns the first element in
$args after all of the callbacks have processed, meaning the value may be different than what was passed into when the event fired.
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These are the PHP constructs used in WordPress Core for