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<?php $arr = Array ( Array ( "id" => 99, "fruit" => "Apple", "color" => "Green" ), Array ( "id" => 99, "fruit" => "Apple", "color" => "Red" ), Array ( "id" => 555, "fruit" => "Banana", "color" => "Yellow" ) ); $ids = array_column($arr, "id"); Foreach(array_unique($ids) as $id){ $new[$id] = array_values(array_intersect_key($arr, array_intersect($ids, [$id]))); } Var_dump($new);
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { [99]=> array(2) { [0]=> array(3) { ["id"]=> int(99) ["fruit"]=> string(5) "Apple" ["color"]=> string(5) "Green" } [1]=> array(3) { ["id"]=> int(99) ["fruit"]=> string(5) "Apple" ["color"]=> string(3) "Red" } } [555]=> array(1) { [0]=> array(3) { ["id"]=> int(555) ["fruit"]=> string(6) "Banana" ["color"]=> string(6) "Yellow" } } }

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