ibase_num_fields

<?php
    $dbh = ibase_connect ($host, $username, $password);
    $stmt = 'SELECT * FROM tblname';
    $sth = ibase_query ($dbh, $stmt);

    if (ibase_num_fields($sth) > 0) {
        while ($row = ibase_fetch_object ($sth)) {
            print $row->email . "\n";
       }
    } else {
        die("No Results were found for your query");
    }

    ibase_close ($dbh);
?>