<?php function moveKeyBefore($arr, $find, $move) { if (!isset($arr[$find], $arr[$move])) { return $arr; } $elem = [$move=>$arr[$move]]; // cache the element to be moved $start = array_splice($arr, 0, array_search($find, array_keys($arr))); unset($start[$move]); // only important if $move is in $start return $start + $elem + $arr; } $arr = ['foo1'=>'bar', 'foo2'=>'buzz', 'foo3'=>'bazz']; var_export(moveKeyBefore($arr, 'foo3', 'foo1'));
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