Discuz!教程之DIY主题模块增加主题随机排序功能

如图，添加后的效果，Discuz默认规则里面是没有随机排序的，本教程介绍如果添加随机排序：

修改文件 \source\class\block\forum\block_thread.php

1、参考文件有三个修改点，请按照修改点修改。

2、如果您的网站是gbk的，修改前请务必将block_thread.php文件编码格式转成gbk的，否则前台会乱码。

修改点1

找到代码

'orderby' => array(
'title' => 'threadlist_orderby',
'type'=> 'mradio',
'value' => array(
array('lastpost', 'threadlist_orderby_lastpost'),
array('dateline', 'threadlist_orderby_dateline'),
array('replies', 'threadlist_orderby_replies'),
array('views', 'threadlist_orderby_views'),
array('heats', 'threadlist_orderby_heats'),
array('recommends', 'threadlist_orderby_recommends'),
),
'default' => 'lastpost'
),

修改为

'orderby' => array(
'title' => 'threadlist_orderby',
'type'=> 'mradio',
'value' => array(
array('lastpost', 'threadlist_orderby_lastpost'),
array('dateline', 'threadlist_orderby_dateline'),
array('replies', 'threadlist_orderby_replies'),
array('views', 'threadlist_orderby_views'),
array('heats', 'threadlist_orderby_heats'),
array('recommends', 'threadlist_orderby_recommends'),
array('rand', '随机排序'),
),
'default' => 'lastpost'
),

修改点2

找到代码

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

修改为

$orderby	= isset($parameter['orderby']) ? (in_array($parameter['orderby'],array('lastpost','dateline','replies','views','heats','recommends','rand')) ? $parameter['orderby'] : 'lastpost') : 'lastpost';

修改点3

找到代码

$query = DB::query("SELECT DISTINCT t.*$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;"
);

修改为

if($orderby=='rand'){
$query = DB::query("SELECT DISTINCT t.*$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;"
);
}