在帝国cms内容页根据关键字调用相关内容/没有关键字或者不填写关键字就随机调用

我们使用帝国cms的时候，需要调用当前文章的其他相关的文章，根据关键字相关的方式，代码如下

<?php
if ($navinfor['keyboard'])
{
$c_key=explode(',',$navinfor['keyboard']);
$count=count($c_key);
for($i=0;$i<$count;$i++)
{
if($i==0)
{
$or='';
}
else
{
$or=' or ';
}
$repadd.=$or."keyboard like '%".$c_key[$i]."%'";
}
$r=$empire->fetch1("select * from {$dbtbpre}ecms_news where id<>".$navinfor['id']." and ".$repadd." order by newstime desc limit 1");
if($r[title])
{
$mesql=$empire->query("select titleurl,title,newstime from {$dbtbpre}ecms_news where id<>".$navinfor['id']." and ".$repadd." order by newstime desc limit 10");
while($or=$empire->fetch($mesql))
{
$newstime=date('Y-m-d',$or[newstime]);
?>
<li><a href="<?=$or[titleurl]?>" rel="external nofollow" ><?=$or[title]?></a><span><?=$newstime?></span></li>
<?
}
}
else
{
 
$mesql2=$empire->query("select * from {$dbtbpre}ecms_news where id<>".$navinfor['id']." order by rand() desc limit 10");
while($r2=$empire->fetch($mesql2))
{
$newstime=date('Y-m-d',$o2[newstime]);
?>
<li><a href="<?=$r2[titleurl]?>" rel="external nofollow"  rel="external nofollow" ><?=$r2[title]?></a><span><?=$newstime?></span></li>
<?
}
}
}
else
{
$mesql2=$empire->query("select titleurl,title,newstime from {$dbtbpre}ecms_news   order by rand()  desc limit 10");
while($r2=$empire->fetch($mesql2))
{
$newstime=date('Y-m-d',$r2[newstime]);
?>
<li><a href="<?=$r2[titleurl]?>" rel="external nofollow"  rel="external nofollow" ><?=$r2[title]?></a><span><?=$newstime?></span></li>
<?
}
}
?>

注释：就是我们不填写关键字的时候，随机调用文章，如果我们添加了关键字，没有相关的文章，也是随机调用文章