PHP Manual: dbmopen


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dbmopen

(PHP 3, PHP 4, PECL)

dbmopen -- Opens a DBM database

Description

resource dbmopen ( string filename, string flags )

Opens the specified DBM database in the given mode.

Parameters

filename

The full-path filename of the DBM file to be opened

flags

The file open mode which is one of r, n, c or w, for read-only, new (implies read-write, and most likely will truncate an already-existing database of the same name), create (implies read-write, and will not truncate an already-existing database of the same name) and read-write respectively.

Return Values

Returns an identifier to be passed to the other DBM functions on success, or FALSE on failure.

Notes

Note: If NDBM support is used, NDBM will actually create filename.dir and filename.pag files. GDBM only uses one file, as does the internal flat-file support, and Berkeley DB creates a filename.db file.

Note that PHP does its own file locking in addition to any file locking that may be done by the DBM library itself. PHP does not delete the .lck files it creates. It uses these files simply as fixed inodes on which to do the file locking. For more information on DBM files, see your Unix man pages, or obtain GNU's GDBM.

Note: When safe mode is enabled, PHP checks whether the files or directories you are about to operate on have the same UID (owner) as the script that is being executed.

See Also

dbmclose()