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<?php function bla(&$test){ echo '1'; } bla('qqq');
Output for 8.3.0 - 8.3.7
Fatal error: Uncaught Error: bla(): Argument #1 ($test) could not be passed by reference in /in/h0fTo:7 Stack trace: #0 {main} thrown in /in/h0fTo on line 7
Process exited with code 255.
Output for 8.1.23 - 8.1.28, 8.2.10 - 8.2.18
Fatal error: Uncaught Error: bla(): Argument #1 ($test) cannot be passed by reference in /in/h0fTo:7 Stack trace: #0 {main} thrown in /in/h0fTo on line 7
Process exited with code 255.
Output for 5.3.0 - 5.3.28, 5.4.0 - 5.4.26
Fatal error: Only variables can be passed by reference in /in/h0fTo on line 7
Process exited with code 255.

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