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<?php $a = $b = true; function onlyA($a) { $a = $a; return ! $a; } function onlyB($b) { $b = $b; return ! $b; } var_dump(onlyA());
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 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 ArgumentCountError: Too few arguments to function onlyA(), 0 passed in /in/Z4Kpi on line 14 and exactly 1 expected in /in/Z4Kpi:4 Stack trace: #0 /in/Z4Kpi(14): onlyA() #1 {main} thrown in /in/Z4Kpi on line 4
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20
Warning: Missing argument 1 for onlyA(), called in /in/Z4Kpi on line 14 and defined in /in/Z4Kpi on line 4 Notice: Undefined variable: a in /in/Z4Kpi on line 5 bool(true)

preferences:
209.79 ms | 402 KiB | 222 Q