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run code in 300+ PHP versions simultaneously
<?php namespace Foo; interface AnException extends \Throwable{} class Bar implements AnException{}
Output for 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Fatal error: Class Foo\Bar cannot implement interface Throwable, extend Exception or Error instead in /in/kgWmT on line 7
Process exited with code 255.
Output for 5.6.38
Fatal error: Interface 'Throwable' not found in /in/kgWmT on line 5
Process exited with code 255.

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