Tutorial: Find usages of implemented and overridden PHP methods

In the PHP context, IntelliJ IDEA applies the Find Usages functionality to implemented and overridden methods. Let's consider the following example:

Create an interface, an abstract class that implements it, and two classes that extend the abstract class, organized as follows:
1. An interface MyInterface with a foo() method.
2. An abstract class MyAbstractClass that implements MyInterface.
3. A class MyClass that extends MyAbstractClass, implements foo() required by the interface, and overrides the methods of the parent class.
4. A class MyClassWithDelegate that extends MyClass and implements foo() with a delegate.
5. The $b and $c variables that call foo() from MyClass and MyClassWithDelegate respectively:
<?php interface MyInterface { //press Alt-F7 on foo() here public function foo(); } abstract class MyAbstractClass implements MyInterface { public function foo () { // TODO: Implement foo() method. } } class MyClass extends MyAbstractClass { public function foo() { parent::foo(); } } class MyClassWithDelegate extends MyClass { public function foo() { foo(); } } $b = new MyClass(); $b->foo(); $c = new MyClassWithDelegate(); $c->foo();
From MyInterface, invoke Find Usages Settings for foo() by pressing Control+Alt+Shift+F7 or choosing Edit | Find | Find Usages Settings from the main menu.
In the Find Usages. Method Options dialog that opens, select the Include overriding/implementing methods checkbox and click Find.
IntelliJ IDEA will find the methods that implement or override the base method and display them in the Find tool window:

Last modified: 08 March 2021