帝国CMS相关信息为空时调用其它信息方法

function dp_GetKeyboard($num = 100) {
    global $empire, $public_r, $class_r, $fun_r, $dbtbpre, $class_r, $navinfor;
    $keyid = $navinfor['keyid'];
    $classid = $navinfor['classid'];
    $id = $navinfor['id'];
    $link_num = $class_r[$classid]['link_num'];
    if (!$link_num) {
        return $fun_r['NotLinkNews'];
    }
    $tr = $empire->fetch1("select otherlinktemp, otherlinktempsub, otherlinktempdate from " . GetTemptb("enewspubtemp") . " limit 1");
    $temp_r = explode("[!--empirenews.listtemp--]", $tr['otherlinktemp']);
    if ($keyid) {
        $add = "id in(" . $keyid . ")";
    } else {
        $e = $id + $num;
        $s = $id - $num;
        $add = "classid=" . $classid . " and id>" . $s . " and id<" . $e;
    }
    $key_sql = $empire->query("select id, newstime, title, isurl, titleurl, classid, titlepic from {$dbtbpre}ecms_" . $class_r[$classid]['tbname'] . " where " . $add . " order by newstime desc limit $link_num");
    while ($link_r = $empire->fetch($key_sql)) {
        if ($link_r['id'] == $id) {
            continue;
        }
        $keyboardtext .= RepOtherTemp($temp_r[1], $link_r, $tr);
    }
    if (empty($keyboardtext)) {
        return $fun_r['NotLinkNews'];
    }
    $keyboardtext = $temp_r[0] . $keyboardtext . $temp_r[2];
    return $keyboardtext;
}