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<?php $o1 = new stdClass(); $o2 = o1; $o1->content = 'homepage'; var_dump($o1); var_dump($o2);
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 "o1" in /in/Ers7o:3 Stack trace: #0 {main} thrown in /in/Ers7o on line 3
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 o1 - assumed 'o1' (this will throw an Error in a future version of PHP) in /in/Ers7o on line 3 object(stdClass)#1 (1) { ["content"]=> string(8) "homepage" } string(2) "o1"
Output for 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, 5.5.0 - 5.5.38, 5.6.0 - 5.6.25, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33
Notice: Use of undefined constant o1 - assumed 'o1' in /in/Ers7o on line 3 object(stdClass)#1 (1) { ["content"]=> string(8) "homepage" } string(2) "o1"
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
Notice: Use of undefined constant o1 - assumed 'o1' in /in/Ers7o on line 3 object(stdClass)(1) { ["content"]=> string(8) "homepage" } string(2) "o1"

preferences:
251.29 ms | 402 KiB | 399 Q