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<?php $array_origin = [ [ "id" => 1, "category"=>1 ], [ "id" => 2, "category"=>2 ], ]; $array_origin = array_reduce($array_origin, static function($carry, $item) { $carry[] = $item; if ($item['category'] === 1) { $item['category'] = 2; $carry[] = $item; } return $carry; }, []); var_dump($array_origin);
Output for git.master, git.master_jit, rfc.property-hooks
array(3) { [0]=> array(2) { ["id"]=> int(1) ["category"]=> int(1) } [1]=> array(2) { ["id"]=> int(1) ["category"]=> int(2) } [2]=> array(2) { ["id"]=> int(2) ["category"]=> int(2) } }

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