3v4l.org

run code in 300+ PHP versions simultaneously
<?php declare(strict_mode=1); interface BarInterface { } interface ServerBarInterface { public function doBar(); } interface FooInterface { public function doFoo(BarInterface $bar); } class SomeFoo implements FooInterface { public function doFoo(ServerBarInterface $bar) { $bar->doBar(); } } class RegularBar implements BarInterface {} class ServerBar implements ServerBarInterface { public function doBar() { echo "works"; } } $foo = new SomeFoo; $bar = new RegularBar; $foo->doFoo($bar);
Output for 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
Warning: Unsupported declare 'strict_mode' in /in/M5Buf on line 2 Fatal error: Declaration of SomeFoo::doFoo(ServerBarInterface $bar) must be compatible with FooInterface::doFoo(BarInterface $bar) in /in/M5Buf on line 25
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Warning: Unsupported declare 'strict_mode' in /in/M5Buf on line 2 Fatal error: Declaration of SomeFoo::doFoo(ServerBarInterface $bar) must be compatible with FooInterface::doFoo(BarInterface $bar) in /in/M5Buf on line 22
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Warning: Unsupported declare 'strict_mode' in /in/M5Buf on line 2 Fatal error: Declaration of SomeFoo::doFoo() must be compatible with FooInterface::doFoo(BarInterface $bar) in /in/M5Buf on line 23
Process exited with code 255.
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