[array|string|null$sink_interface = null]
Instructs COM to sink events generated by variant into the PHP object sink_object.
Be careful how you use this feature; if you are doing something similar to the example below, then it doesn't really make sense to run it in a web server context.
sink_object should be an instance of a class with methods named after those of the desired dispinterface; you may use com_print_typeinfo to help generate a template class for this purpose.
PHP will attempt to use the default dispinterface type specified by the typelibrary associated with variant, but you may override this choice by setting sink_interface to the name of the dispinterface that you want to use.
Returns true on success or false on failure.
Prior to PHP 8.0.0, calling exit from any of the event handlers is not supported, and may cause PHP to hang. This can be worked around by throwing an exception from the event handler, catching the exception in the main code, and calling exit from there.
|8.0.0||sink_interface is nullable now.|