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#maybe someone will analyse which libraries fail and wich work (e.g. wait). git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@102748 c90b9560-bf6c-de11-be94-00142212c4b1
80 lines
2.9 KiB
XML
80 lines
2.9 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.4 $ -->
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<!-- splitted from ./en/functions/dba.xml, last change in rev 1.2 -->
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<refentry id="function.dba-open">
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<refnamediv>
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<refname>dba_open</refname>
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<refpurpose>Open database</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Description</title>
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<methodsynopsis>
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<type>resource|false</type><methodname>dba_open</methodname>
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<methodparam><type>string</type><parameter>path</parameter></methodparam>
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<methodparam><type>string</type><parameter>mode</parameter></methodparam>
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<methodparam><type>string</type><parameter>handler</parameter></methodparam>
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<methodparam choice="opt"><parameter>...</parameter></methodparam>
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</methodsynopsis>
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<para>
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<function>dba_open</function> establishes a database instance for
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<parameter>path</parameter> with <parameter>mode</parameter> using
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<parameter>handler</parameter>.
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</para>
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<para>
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<parameter>path</parameter> is commonly a regular path in your filesystem.
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</para>
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<para>
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<parameter>mode</parameter> is "r" for read access, "w" for read/write
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access to an already existing database, "c" for read/write access
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and database creation if it doesn't currently exist, and "n" for
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create, truncate and read/write access.
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</para>
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<para>
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<parameter>handler</parameter> is the <link linkend="dba.requirements">name
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of the handler</link> which shall be
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used for accessing <parameter>path</parameter>. It is passed all optional
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parameters given to <function>dba_open</function> and can act on behalf of
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them.
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</para>
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<para>
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<function>dba_open</function> returns a positive handle or &false;, in
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the case the open is successful or fails, respectively.
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</para>
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<note>
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<para>
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There can only be one writer for one database file. When you use dba on
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a webserver and more than one request requires write operations they can
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only be done one after another. Unfortuanetly some of the external
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libraries simply fail or ignore this when trying to open the database for
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another write operation. In this case you must use semaphores to guard
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against. See <link linkend="ref.sysvsem">System V semaphore support</link>.
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</para>
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</note>
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<para>
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See also:
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<function>dba_popen</function>
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<function>dba_close</function>
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</para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"../../../../manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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