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>XI. dbm functions</H1
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>&#13;   These functions allow you to store records stored in a dbm-style
   database. This type of database (supported by the Berkeley db,
   gdbm, 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).</P
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>Example 1. dbm example</B
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>  1&nbsp;
  2&nbsp;$dbm = dbmopen("lastseen", "w");
  3&nbsp;if (dbmexists($dbm, $userid)) {
  4&nbsp;  $last_seen = dbmfetch($dbm, $userid);
  5&nbsp;} else {
  6&nbsp;  dbminsert($dbm, $userid, time());
  7&nbsp;}
  8&nbsp;do_stuff();
  9&nbsp;dbmreplace($dbm, $userid, time());
 10&nbsp;dbmclose($dbm);
 11&nbsp;</PRE
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><A
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>dbmopen</A
> &#8212; opens a dbm database</DT
><DT
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HREF="function.dbmclose.html"
>dbmclose</A
> &#8212; closes a dbm database</DT
><DT
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>dbmexists</A
> &#8212; tells if a value exists for a key in a dbm database</DT
><DT
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>dbmfetch</A
> &#8212; fetches a value for a key from a dbm database</DT
><DT
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>dbminsert</A
> &#8212; inserts a value for a key in a dbm database</DT
><DT
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>dbmreplace</A
> &#8212; replaces the value for a key in a dbm database</DT
><DT
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>dbmdelete</A
> &#8212; deletes the value for a key from a dbm database</DT
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>dbmfirstkey</A
> &#8212; retrieves the first key from a dbm database</DT
><DT
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>dbmnextkey</A
> &#8212; retrieves the next key from a dbm database</DT
><DT
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>dblist</A
> &#8212; describes the dbm-compatible library being used</DT
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