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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.4 $ -->
<!-- splitted from ./en/functions/dbm.xml, last change in rev 1.2 -->
<refentry id="function.dbmopen">
<refnamediv>
<refname>dbmopen</refname>
<refpurpose>Opens a DBM database</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>resource</type><methodname>dbmopen</methodname>
<methodparam><type>string</type><parameter>filename</parameter></methodparam>
<methodparam><type>string</type><parameter>flags</parameter></methodparam>
</methodsynopsis>
<para>
The first argument is the full-path filename of the DBM file to
be opened and the second is 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.
</para>
<para>
Returns an identifier to be passed to the other DBM functions on
success, or &false; on failure.
</para>
<para>
If NDBM support is used, NDBM will actually create <filename>filename.dir</filename>
and <filename>filename.pag</filename> files. GDBM only uses one file, as does the
internal flat-file support, and Berkeley DB creates a
<filename>filename.db</filename> 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
<filename>.lck</filename> 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
<ulink url="&url.gdbm;">GNU's GDBM</ulink>.
</para>
¬e.sm.uidcheck;
</refsect1>
</refentry>
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