here is a good example for this;
$dbh = dba_open( "./data/products", "c", "gdbm" )
or die( "Couldn't open database" );
dba_insert( "Sonic Screwdriver", "23.20", $dbh);
dba_insert( "Tricorder", "55.50", $dbh);
dba_insert( "ORAC AI", "2200.50", $dbh);
dba_insert( "HAL 2000", "4500.50", $dbh);
dba_close( $dbh );
you may find more about the topic in this URL:
http://www.samspublishing.com /articles/article.asp?p=29742&seqNum=3&rl=1