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<?php trait Helper { protected function foo() { echo "foo"; } } trait MyTrait { use Helper; } abstract class Controller { use Helper; } class MyController extends Controller { use MyTrait; public function myFunction() { foo(); } } (new MyController)->myFunction();
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Call to undefined function foo() in /in/f9NSQ:24 Stack trace: #0 /in/f9NSQ(28): MyController->myFunction() #1 {main} thrown in /in/f9NSQ on line 24
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.38
Fatal error: Call to undefined function foo() in /in/f9NSQ on line 24
Process exited with code 255.

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