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<?php var_dump(array( 't' => 1, test_dump => 123 ));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught Error: Undefined constant "test_dump" in /in/jn1bc:5 Stack trace: #0 {main} thrown in /in/jn1bc on line 5
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant test_dump - assumed 'test_dump' (this will throw an Error in a future version of PHP) in /in/jn1bc on line 5 array(2) { ["t"]=> int(1) ["test_dump"]=> int(123) }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20
Notice: Use of undefined constant test_dump - assumed 'test_dump' in /in/jn1bc on line 5 array(2) { ["t"]=> int(1) ["test_dump"]=> int(123) }

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