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<?php $arr = array("1" => "C", "2" => "B", "3" => "A"); print_r($arr); usort($arr); print_r($arr);
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
Array ( [1] => C [2] => B [3] => A ) Fatal error: Uncaught ArgumentCountError: usort() expects exactly 2 arguments, 1 given in /in/t8T3J:7 Stack trace: #0 /in/t8T3J(7): usort(Array) #1 {main} thrown in /in/t8T3J on line 7
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.17 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Array ( [1] => C [2] => B [3] => A ) Warning: usort() expects exactly 2 parameters, 1 given in /in/t8T3J on line 7 Array ( [1] => C [2] => B [3] => A )
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Array ( [1] => C [2] => B [3] => A ) Warning: Wrong parameter count for usort() in /in/t8T3J on line 7 Array ( [1] => C [2] => B [3] => A )

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282.3 ms | 403 KiB | 381 Q