関連ワード:  php find in array multidimensional    php find in multidimensional array by value    php find in multidimensional array by key    php search in array multidimensional    php search in multidimensional array by key value    php search in multidimensional array by value    php find duplicates in multidimensional array    php find element in multidimensional array    php find index in multidimensional array by value    php find string in multidimensional array