php-doc-en/reference/dbm/reference.xml

<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.11 $ -->
<!-- State: deprecated -->

 <reference id="ref.dbm">
  <title>DBM Functions [deprecated]</title>
  <titleabbrev>DBM</titleabbrev>

  <partintro>
   <section id="dbm.intro">
    &reftitle.intro;
    <para>
     These functions allow you to store records stored in a dbm-style
     database. This type of database (supported by the Berkeley DB,
     <ulink url="&url.gdbm;">GDBM</ulink>, and some system libraries,
     as well as a built-in flatfile library) stores key/value pairs
     (as opposed to the full-blown records supported by relational
     databases).
    </para>
    <note>
     <para>
      However, dbm support is deprecated and you are encouraged to use the
      <link linkend="ref.dba">Database (dbm-style) abstraction layer functions</link>
      instead.
     </para>
    </note>
   </section>
   
   <section id="dbm.required">
    &reftitle.required;
    <para>
     To use this functions you have to compile PHP with support for an
     underlying database. See the 
     <link linkend="dba.requirements">list</link> of supported Databases.
    </para>
   </section>
   
   &reference.dbm.configure;
   
   <section id="dbm.runtime">
    &reftitle.runtime;
    &no.config;
   </section>

   <section id="dbm.resources">
    &reftitle.resources;
    <para>
     The function <function>dbmopen</function> returns an database identifier
     which is used by the other dbm-functions.
    </para>
   </section>
   
   <section id="dbm.constants">
    &reftitle.constants;
    &no.constants;
   </section>
   
   <section id="dbm.examples">
   &reftitle.examples;
   <para>
    <example>
     <title>DBM example</title>
     <programlisting role="php">
<![CDATA[
<?php

$dbm = dbmopen("lastseen", "w");
if (dbmexists($dbm, $userid)) {
    $last_seen = dbmfetch($dbm, $userid);
} else {
    dbminsert($dbm, $userid, time());
}
do_stuff();
dbmreplace($dbm, $userid, time());
dbmclose($dbm);

?>
]]>
     </programlisting>
    </example>
   </para>
  </section>
  </partintro>

&reference.dbm.functions;

 </reference>
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