3v4l.org

run code in 300+ PHP versions simultaneously
<?php class ParentClass { } class MyClass extends ParentClass { } $a = new MyClass; var_dump($a !instanceof MyClass); var_dump($a instanceof ParentClass);
Output for 5.3.0 - 5.3.27, 5.4.0 - 5.4.22
Parse error: syntax error, unexpected '!' in /in/VF3eo on line 12
Process exited with code 255.
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268.53 ms | 1399 KiB | 58 Q