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<?php function swapOutermost(&$a) { if(count($a) < 2){ return; } $len = count($a); $temp = $a[0]; $a[0] = $a[$len - 1]; $a[$len - 1] = $temp; swapOutermost(array_slice($a, 1, $len - 2)); } $array = [1, 2, 3, 4, 5, 6, 7]; swapOutermost($array); var_export($array);
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.3.33, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.13
Notice: Only variables should be passed by reference in /in/CT5QZ on line 11 Notice: Only variables should be passed by reference in /in/CT5QZ on line 11 Notice: Only variables should be passed by reference in /in/CT5QZ on line 11 array ( 0 => 7, 1 => 2, 2 => 3, 3 => 4, 4 => 5, 5 => 6, 6 => 1, )
Output for 7.3.32, 7.4.26
array ( 0 => 7, 1 => 2, 2 => 3, 3 => 4, 4 => 5, 5 => 6, 6 => 1, )
preferences:
150.56 ms | 407 KiB | 5 Q