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run code in 500+ PHP versions simultaneously
<?php $arr1 = [2,1,3,4,5,6,6,7]; $arr2 = [1,2,3,4,5,6,7]; $arr3 = [1,3,4,5,6,7]; $arr4 = [1,5,6,7,4,3,2]; sort($arr1); sort($arr2); sort($arr3); sort($arr4); $n = 7; $range = range(1,$n); var_dump($arr1 == $range); var_dump($arr2 == $range); var_dump($arr3 == $range); var_dump($arr4 == $range);
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
bool(false) bool(true) bool(false) bool(true)
preferences:
90.51 ms | 1950 KiB | 4 Q