関連ワード:  php if in multidimensional array    php check if in multidimensional array    php if key exists in multidimensional array    php check if value in multidimensional array    php check if multidimensional array is empty    php check if multidimensional array key exists    php check if multidimensional array contains value    php check if multidimensional array value exists    php check if multidimensional array contains same values    php check if key value exists in multidimensional array