3v4l.org

run code in 300+ PHP versions simultaneously
<?php error_reporting(E_ALL & ~E_STRICT); class A { public function doSth(A $a) { echo 'asd'; } } class B extends A { public function doSth(B $a) { echo 'qwe'; } } $a = new A(); $b = new B(); $b->doSth($b);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Declaration of B::doSth(B $a) must be compatible with A::doSth(A $a) in /in/MaX4L on line 11
Process exited with code 255.

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