php 数组排序 按值,php – 按值排序数组
我正在為我的論壇創建一個“固定”功能,我正在尋找一種方法將我的固定主題放在數組的開頭,以便它們“卡在”頁面的頂部.
如果主題沒有固定,則topic_pinned = NULL,如果它被固定,則topic_pinned = 0.
該數組按topic_updated排序.固定主題需要在保留在頁面頂部時按topic_updated保持排序,然后在固定主題下是非固定主題,也按topic_updated排序.
主題數組($forum_topic_results)：
Array
(
[0] => Array
(
[topic_id] => 4
[topic_subject] => Test Subject #4
[topic_date] => 2015-09-10 18:34:18
[topic_by] => 1
[topic_pinned] =>
[topic_updated] => 2015-09-10 20:37:22
)
[1] => Array
(
[topic_id] => 3
[topic_subject] => Test Subject #3
[topic_date] => 2015-08-22 09:24:40
[topic_by] => 1
[topic_pinned] => 0
[topic_updated] => 2015-09-04 22:02:31
)
[2] => Array
(
[topic_id] => 2
[topic_subject] => Test Subject #2
[topic_date] => 2015-08-15 10:56:00
[topic_by] => 1
[topic_pinned] =>
[topic_updated] => 2015-09-04 19:45:32
)
[3] => Array
(
[topic_id] => 1
[topic_subject] => Test Subject #1
[topic_date] => 2015-08-30 19:48:17
[topic_by] => 1
[topic_pinned] => 0
[topic_updated] => 2015-09-03 00:44:38
)
)
PHP：
/**
* getAllTopics
*
* Retreives the topics of the chosen category from the `forum_topics` table.
*
* @param $cat_id
* @access public
*/
public function getAllTopics($cat_id=NULL)
{
$database=$this->database;
$database->query('SELECT topic_id, topic_subject, topic_date, topic_by, topic_pinned, topic_locked FROM forum_topics WHERE topic_cat = :catid ORDER BY topic_updated DESC', array(':catid' => $cat_id));
$result = $database->statement->fetchAll(PDO::FETCH_ASSOC);
return $result;
}
# Get topics
$forum_topic_results = $this->getAllTopics($_GET['cat']);
foreach($forum_topic_results as $forum_topic_row)
{
# Get user's username.
$topic_by=SearchUser($forum_topic_row['topic_by']);
$data.='
'.'
'.'
'.$forum_topic_row['topic_subject'].'
'.'by '.$topic_by['username'].' on '.date('D M d, Y g:i a', strtotime($forum_topic_row['topic_date'])).
'
'.'
';}
結果我想：
Array
(
[0] => Array
(
[topic_id] => 3
[topic_subject] => Test Subject #3
[topic_date] => 2015-08-22 09:24:40
[topic_by] => 1
[topic_pinned] => 0
[topic_updated] => 2015-09-04 22:02:31
)
[1] => Array
(
[topic_id] => 1
[topic_subject] => Test Subject #1
[topic_date] => 2015-08-30 19:48:17
[topic_by] => 1
[topic_pinned] => 0
[topic_updated] => 2015-09-03 00:44:38
)
[2] => Array
(
[topic_id] => 4
[topic_subject] => Test Subject #4
[topic_date] => 2015-09-10 18:34:18
[topic_by] => 1
[topic_pinned] =>
[topic_updated] => 2015-09-10 20:37:22
)
[3] => Array
(
[topic_id] => 2
[topic_subject] => Test Subject #2
[topic_date] => 2015-08-15 10:56:00
[topic_by] => 1
[topic_pinned] =>
[topic_updated] => 2015-09-04 19:45:32
)
)
總結
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