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; }