概要 1.以下のときに"apple","grape"の値だけを返したい ["apple", "orange", "grape"] ["apple", "grape", "banana"] 2.array_intersect()を使う 配列で、共通の値だけを抜き出したい $array_1 = ["apple", "orange", "grape"]; $array_2 = ["apple", "grap…