通过多个键对多维数组进行排序
我试图通过多个键对多维数组进行排序，但我不知道从哪里开始。我看了uasort，但不确定如何根据需要编写函数。
我需要按状态排序，然后按event_type排序，然后按日期排序。
我的数组如下所示：
Array
( [0] => Array ( [ID] => 1 [title] => Boring Meeting [date_start] => 2010-07-30 [time_start] => 06:45:PM [time_end] => [state] => new-york [event_type] => meeting )
[1] => Array
(
[ID] => 2
[title] => Find My Stapler
[date_start] => 2010-07-22
[time_start] => 10:45:AM
[time_end] =>
[state] => new-york
[event_type] => meeting
)
[2] => Array
(
[ID] => 3
[title] => Mario Party
[date_start] => 2010-07-22
[time_start] => 02:30:PM
[time_end] => 07:15:PM
[state] => new-york
[event_type] => party
)
[3] => Array
(
[ID] => 4
[title] => Duct Tape Party
[date_start] => 2010-07-28
[time_start] => 01:00:PM
[time_end] =>
[state] => california
[event_type] => party
)
...... etc 问题来源于stack overflow
写回答
-
你需要 array_multisort
$mylist = array( array('ID' => 1, 'title' => 'Boring Meeting', 'event_type' => 'meeting'), array('ID' => 2, 'title' => 'Find My Stapler', 'event_type' => 'meeting'), array('ID' => 3, 'title' => 'Mario Party', 'event_type' => 'party'), array('ID' => 4, 'title' => 'Duct Tape Party', 'event_type' => 'party') );
get a list of sort columns and their data to pass to array_multisort
$sort = array(); foreach($mylist as $k=>$v) { $sort['title'][$k] = $v['title']; $sort['event_type'][$k] = $v['event_type']; }
sort by event_type desc and then title asc
array_multisort($sort['event_type'], SORT_DESC, $sort['title'], SORT_ASC,$mylist); 从PHP 5.5.0开始：
array_multisort(array_column($mylist, 'event_type'), SORT_DESC, array_column($mylist, 'title'), SORT_ASC, $mylist); $mylist 就是现在：
array ( 0 => array ( 'ID' => 4, 'title' => 'Duct Tape Party', 'event_type' => 'party', ), 1 => array ( 'ID' => 3, 'title' => 'Mario Party', 'event_type' => 'party', ), 2 => array ( 'ID' => 1, 'title' => 'Boring Meeting', 'event_type' => 'meeting', ), 3 => array ( 'ID' => 2, 'title' => 'Find My Stapler', 'event_type' => 'meeting', ), )
2020-02-08 19:27:16赞同 展开评论 打赏
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