dba_popen

Open database persistently (PHP 4, PHP 5)
resource dba_popen ( string path, string mode [, string handler [, mixed ...]] )

dba_popen() establishes a persistent database instance for path with mode using handler.

path: Commonly a regular path in your filesystem.
mode: It is r for read access, w for read/write access to an already existing database, c for read/write access and database creation if it doesn't currently exist, and n for create, truncate and read/write access.
handler: The name of the handler which shall be used for accessing path. It is passed all optional parameters given to dba_popen() and can act on behalf of them.

Returns a positive handle on success, or FALSE on failure.