Here is some sample source:

<?
        // ** Write to database **
        $dbh = dba_open("/tmp/test.db3","c","db3");
        for($x=0;$x<500;$x++)
        {
                $key = strval($x);
                $value = "test" . $key;
                $res = dba_insert($key,$value,$dbh);

// Debug
if(!$res) echo "Failed to add rec $x<br>";

        }
        dba_close($dbh);
        echo "Done adding<br>";

        // ** Read back **
        echo "Read back<br>";
        $dbh = dba_open("/tmp/test.db3","r","db3");
        if ($dbh == false)
        {
         echo "Database failed to open<BR>";
        }
        $key = dba_firstkey($dbh);
        if ($key == false)
        {
         echo "Unable to use dba_firstkey to find initial key<BR>";
        }
        echo "First key is $key<BR>";
        $x=0;
        while($key != false)
        {
                $value = dba_fetch($key,$dbh);
                echo "$key,$value<br>";
                $key = dba_nextkey($dbh);
                $x++;
        }
        dba_close($dbh);
        echo "Finished ! ($x records read back)<br>";
?>

Berkeley-DB is version 3.3.11
C Compiler is GNU C 2.95.3
Apache HTTPD is V2.0.40

PHP configured by

'./configure' '--with-apxs2=/usr/local/apache2/bin/apxs' '--with-db3=/usr/local/BerkeleyDB.3.3' 

Basically, it's writing 500 records to the DB3 file (I can cat it and see the resultant output) and then trying to read them back.  Not one record is read back because db_firstkey returns FALSE.

Help appreciated

Jason