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<?php $a = array(); $a[] = 1; $a[] = 2; $a[] = 3; usort($a); var_dump($a);
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 ArgumentCountError: usort() expects exactly 2 arguments, 1 given in /in/bt8ci:7 Stack trace: #0 /in/bt8ci(7): usort(Array) #1 {main} thrown in /in/bt8ci 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 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33
Warning: usort() expects exactly 2 parameters, 1 given in /in/bt8ci on line 7 array(3) { [0]=> int(1) [1]=> int(2) [2]=> int(3) }
Output for 5.2.3 - 5.2.17
Warning: Wrong parameter count for usort() in /in/bt8ci on line 7 array(3) { [0]=> int(1) [1]=> int(2) [2]=> int(3) }
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 - 5.2.2
<br /> <b>Warning</b>: Wrong parameter count for usort() in <b>/in/bt8ci</b> on line <b>7</b><br /> array(3) { [0]=> int(1) [1]=> int(2) [2]=> int(3) }

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