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<?php // first one $array = range(1, 11); $new_array = []; for ($i = 0; $i < sizeof($array); $i++) { if ($i < (sizeof($array) / 2)) $new_array[$i] = $array[$i * 2]; else $new_array[$i] = $array[(sizeof($array) - $i) * 2 - 1]; } var_dump($new_array); // second one $array = range(1, 11); $new_array = []; for ($i = 0; $i < sizeof($array); $i++) { $index = ($i % 2) ? sizeof($array) - ceil($i / 2) : ceil($i / 2); $new_array[$index] = $array[$i]; } ksort($new_array); var_dump($new_array);
Output for rfc.property-hooks, git.master, git.master_jit
array(11) { [0]=> int(1) [1]=> int(3) [2]=> int(5) [3]=> int(7) [4]=> int(9) [5]=> int(11) [6]=> int(10) [7]=> int(8) [8]=> int(6) [9]=> int(4) [10]=> int(2) } array(11) { [0]=> int(1) [1]=> int(3) [2]=> int(5) [3]=> int(7) [4]=> int(9) [5]=> int(11) [6]=> int(10) [7]=> int(8) [8]=> int(6) [9]=> int(4) [10]=> int(2) }

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