簡單的說，就是每隔一段時間（自己設(shè)定的數(shù)據(jù)緩存時間），即使沒有新帖子，這個diy模塊所調(diào)用的帖子也會變。

方式：加個選項，然后查詢數(shù)據(jù)的時候把這個選項作為一個條件，選它就按它來調(diào)用。

具體操作：
1.打開/source/class/block/forum/block_threadhot.php，找到
array('recommends', 'threadlist_orderby_recommends'),
之下增加
array('rands', '隨機'),
2.打開/source/class/block/forum/block_thread.php，找到
$orderby = isset($parameter['orderby']) ? (in_array($parameter['orderby'],array('lastpost','dateline','replies','views','heats','recommends')) ? $parameter['orderby'] : 'lastpost') : 'lastpost';
$lastposter = !empty($parameter['lastposter']) ? $parameter['lastposter'] : '';

改為
$orderby = isset($parameter['orderby']) ? (in_array($parameter['orderby'],array('lastpost','dateline','replies','views','heats','recommends','rands')) ? $parameter['orderby'] : 'lastpost') : 'lastpost';
$lastposter = !empty($parameter['lastposter']) ? $parameter['lastposter'] : '';

其實就是增加了,'rands'
3.找到
$query = DB::query("SELECT DISTINCT t.*$sqlfield
FROM `".DB::table('forum_thread')."` t
$sqlfrom WHERE {$maxwhere}t.readperm='0'
$sql
AND t.displayorder>='0'
ORDER BY t.$orderby DESC
LIMIT $startrow,$items;"
);

改為
if($orderby=='rands'){
$query = DB::query("SELECT DISTINCT t.* $sqlfield FROM `".DB::table('forum_thread')."` t $sqlfrom WHERE {$maxwhere}t.readperm='0' $sql AND t.displayorder>='0' ORDER BY rand() LIMIT $startrow,$items;");
}else{
$query = DB::query("SELECT DISTINCT t.*$sqlfield
FROM `".DB::table('forum_thread')."` t
$sqlfrom WHERE {$maxwhere}t.readperm='0'
$sql
AND t.displayorder>='0'
ORDER BY t.$orderby DESC
LIMIT $startrow,$items;"
);
}
就是在數(shù)據(jù)查詢的外層加上了判斷，如果是隨機排序，查詢里排序條件就用ORDER BY rand()，否則按原本的排序條件。