3v4l.org

run code in 300+ PHP versions simultaneously
<?hh class A<T> { protected T $value; public function set(T $value) { $this->value = $value; } } class B { public function doB() : string { return "b"; } } class C extends B { public function doC() : string { return "c"; } } function foo(A<B> $vec) { $vec->add(new B()); } function bar(A<C> $vec) { foo($vec); } $v = new A<C>(); bar($v);
Output for git.master, git.master_jit, rfc.property-hooks
<?hh class A<T> { protected T $value; public function set(T $value) { $this->value = $value; } } class B { public function doB() : string { return "b"; } } class C extends B { public function doC() : string { return "c"; } } function foo(A<B> $vec) { $vec->add(new B()); } function bar(A<C> $vec) { foo($vec); } $v = new A<C>(); bar($v);

This tab shows result from various feature-branches currently under review by the php developers. Contact me to have additional branches featured.

Active branches

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

preferences:
31.28 ms | 402 KiB | 8 Q