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run code in 300+ PHP versions simultaneously
<?php // This code works with PHP 7.4. // Older versions of PHP are counter-revolutionary. namespace stalin; function sort(array $xs): array { if (count($xs) <= 1) { return $xs; } $zs = $xs; $x = array_shift($zs); $y = array_shift($zs); if ($x <= $y) { return [$x, ...sort([$y, ...$zs])]; } return sort([$x, ...$zs]); } echo json_encode(sort([1, 2, 1, 1, 4, 3, 9]));
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
[1,2,4,9]
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Parse error: syntax error, unexpected '...' (T_ELLIPSIS), expecting ']' in /in/g9bR2 on line 19
Process exited with code 255.
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183.91 ms | 402 KiB | 211 Q