3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo {} class Bar extends Foo {} class Baz {} $foo = new Foo; $bar = new Bar; $baz = new Baz; var_dump([ !($bar instanceof Foo), !(Bar instanceof Foo), !($baz instanceof $foo), ]);
Output for 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: Undefined constant "Bar" in /in/2LuN6:15 Stack trace: #0 {main} thrown in /in/2LuN6 on line 15
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant Bar - assumed 'Bar' (this will throw an Error in a future version of PHP) in /in/2LuN6 on line 15 array(3) { [0]=> bool(false) [1]=> bool(true) [2]=> bool(true) }
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25
Notice: Use of undefined constant Bar - assumed 'Bar' in /in/2LuN6 on line 15 array(3) { [0]=> bool(false) [1]=> bool(true) [2]=> bool(true) }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[', expecting ')' in /in/2LuN6 on line 13
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[', expecting ')' in /in/2LuN6 on line 13
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/2LuN6 on line 13
Process exited with code 255.
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