@@ -107,19 +107,31 @@ using a special "tag":
107107 ->addTag('kernel.event_listener', array('event' => 'kernel.exception'))
108108 ;
109109
110+
111+ listener class:
112+
113+ #. If the ``kernel.event_listener `` tag defines the ``method `` attribute, that's
114+ the name of the method to be executed;
115+ #. If no ``method `` attribute is defined, try to execute the method whose name
116+ is ``on `` + "camel-cased event name" (e.g. ``onKernelException() `` method for
117+ the ``kernel.exception `` event);
118+ #. If that method is not defined either, try to execute the ``__invoke() `` magic
119+ method (which makes event listeners invokable);
120+ #. If the ``_invoke() `` method is not defined either, throw an exception.
121+
122+ .. versionadded :: 4.1
123+ The support of the ``__invoke() `` method to create invokable event listeners
124+ was introduced in Symfony 4.1.
125+
110126.. note ::
111127
112- There is an optional tag attribute called ``method `` which defines which method
113- to execute when the event is triggered. By default the name of the method is
114- ``on `` + "camel-cased event name". If the event is ``kernel.exception `` the
115- method executed by default is ``onKernelException() ``.
116-
117- The other optional tag attribute is called ``priority ``, which defaults to
118- ``0 `` and it controls the order in which listeners are executed (the highest
119- the priority, the earlier a listener is executed). This is useful when you
120- need to guarantee that one listener is executed before another. The priorities
121- of the internal Symfony listeners usually range from ``-255 `` to ``255 `` but
122- your own listeners can use any positive or negative integer.
128+ There is an optional attribute for the ``kernel.event_listener `` tag called
129+ ``priority ``, which defaults to ``0 `` and it controls the order in which
130+ listeners are executed (the highest the priority, the earlier a listener is
131+ executed). This is useful when you need to guarantee that one listener is
132+ executed before another. The priorities of the internal Symfony listeners
133+ usually range from ``-255 `` to ``255 `` but your own listeners can use any
134+ positive or negative integer.
123135
124136.. _events-subscriber :
125137
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