関連ワード:  check if value exists in array php    check if variable exists in array php    check if value contains in array php    check if value exists in multidimensional array php    check if value exists in associative array php    check if value already exists in array php    check if value not exists in array php    check if value exists in two dimensional array php    check if key and value exists in array php    check if value exists in array of objects php