3v4l.org

run code in 300+ PHP versions simultaneously
<?php trait TraitA { protected function doSomething(): string { return 'FOO'; } } trait TraitB { abstract protected function doSomething(): string; } class ParentClass { use TraitB; use TraitA; } class ChildClass extends ParentClass { public function __construct() { echo $this->doSomething(); } } $class = new ChildClass();
Output for 8.1.0 - 8.1.31, 8.2.0 - 8.2.19, 8.2.21 - 8.2.27, 8.3.0 - 8.3.7, 8.3.9 - 8.3.15, 8.4.1 - 8.4.2
FOO
Output for 8.2.20, 8.3.8
Fatal error: Uncaught Error: Call to protected method ParentClass::doSomething() from scope ChildClass in /in/lFFsD:25 Stack trace: #0 /in/lFFsD(29): ChildClass->__construct() #1 {main} thrown in /in/lFFsD on line 25
Process exited with code 255.
preferences:
74.84 ms | 407 KiB | 5 Q