If your data storage needs no validity period, the system also provides a quick method F can be used to cache for faster operation.
F method can support different types of memory, if the file type, then by default under DATA_PATH directory.
Fast Cache Data Data
F('data',$Data);
Fast Cache Data data saved to the specified directory
F('data',$Data,TEMP_PATH);
Gets a cached data
$Data = F('data');
Delete cache data
F('data',NULL);
F method supports automatically create cache subdirectory in DATA_PATH
the directory cache data following the data, if the User subdirectory does not exist, it is created automatically:
F('User/data',$Data);
System built-in data field information cache is to use a fast caching mechanism.