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<?php function reorderArray($array, $key) { $found = false; foreach($array as $k=>$v) { $found = $found || $k===$key; if(!$found) { unset($array[$k]); $array[$k] = $v; } } return $array; } $array=['n1'=>'foo', 'n4'=>'bar', 'n6'=>'baz', 'n7'=>'baz']; var_dump(reorderArray($array, 'n1'));

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41.88 ms | 402 KiB | 5 Q