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<?php $d1 = new DateTime('1 march 2014 04:13'); $d2 = new DateTime('2 march 2014 05:13'); print (d2 - d1)[d]; print "Hello"; ?>
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 "d2" in /in/S1isP:6 Stack trace: #0 {main} thrown in /in/S1isP on line 6
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Warning: Use of undefined constant d2 - assumed 'd2' (this will throw an Error in a future version of PHP) in /in/S1isP on line 6 Warning: Use of undefined constant d1 - assumed 'd1' (this will throw an Error in a future version of PHP) in /in/S1isP on line 6 Warning: A non-numeric value encountered in /in/S1isP on line 6 Warning: A non-numeric value encountered in /in/S1isP on line 6 Warning: Use of undefined constant d - assumed 'd' (this will throw an Error in a future version of PHP) in /in/S1isP on line 6 Notice: Trying to access array offset on value of type int in /in/S1isP on line 6 Hello
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Warning: Use of undefined constant d2 - assumed 'd2' (this will throw an Error in a future version of PHP) in /in/S1isP on line 6 Warning: Use of undefined constant d1 - assumed 'd1' (this will throw an Error in a future version of PHP) in /in/S1isP on line 6 Warning: A non-numeric value encountered in /in/S1isP on line 6 Warning: A non-numeric value encountered in /in/S1isP on line 6 Warning: Use of undefined constant d - assumed 'd' (this will throw an Error in a future version of PHP) in /in/S1isP on line 6 Hello
Output for 7.1.0 - 7.1.33
Notice: Use of undefined constant d2 - assumed 'd2' in /in/S1isP on line 6 Notice: Use of undefined constant d1 - assumed 'd1' in /in/S1isP on line 6 Warning: A non-numeric value encountered in /in/S1isP on line 6 Warning: A non-numeric value encountered in /in/S1isP on line 6 Notice: Use of undefined constant d - assumed 'd' in /in/S1isP on line 6 Hello
Output for 7.0.0 - 7.0.33
Notice: Use of undefined constant d2 - assumed 'd2' in /in/S1isP on line 6 Notice: Use of undefined constant d1 - assumed 'd1' in /in/S1isP on line 6 Notice: Use of undefined constant d - assumed 'd' in /in/S1isP on line 6 Hello
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, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Parse error: syntax error, unexpected '[' in /in/S1isP on line 6
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 '[' in /in/S1isP on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/S1isP on line 6
Process exited with code 255.

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