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<?php class Test { } $b = new Test(); $a = array($b => 'foo'); var_dump($a[$b]);
Output for 8.3.0 - 8.3.6
Fatal error: Uncaught TypeError: Cannot access offset of type Test on array in /in/1eJsW:8 Stack trace: #0 {main} thrown in /in/1eJsW on line 8
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18
Fatal error: Uncaught TypeError: Illegal offset type in /in/1eJsW:8 Stack trace: #0 {main} thrown in /in/1eJsW on line 8
Process exited with code 255.
Output for 5.2.3 - 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, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Illegal offset type in /in/1eJsW on line 8 Warning: Illegal offset type in /in/1eJsW on line 11 NULL
Output for 4.3.9 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.2
<br /> <b>Warning</b>: Illegal offset type in <b>/in/1eJsW</b> on line <b>8</b><br /> <br /> <b>Warning</b>: Illegal offset type in <b>/in/1eJsW</b> on line <b>11</b><br /> NULL
Output for 4.3.0 - 4.3.8
<br /> <b>Warning</b>: Illegal offset type in <b>/in/1eJsW</b> on line <b>11</b><br /> NULL

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