Open c9s opened 9 years ago
$array = [ [ "name" => "John", "city_id" => 3 ], [ "name" => "Mary", "city_id" => 3 ], [ "name" => "Lisa", "city_id" => 1 ], [ "name" => "Joe", "city_id" => 4 ], ]; $grouped = array_group_by($array, "city_id"); $grouped[3] = [ [ "name" => "John", "city_id" => 3 ], [ "name" => "Mary", "city_id" => 3 ] ]; $grouped[1] = [ [ "name" => "Lisa", "city_id" => 1 ] ]; $grouped[4] = [ [ "name" => "Joe", "city_id" => 4 ] ];