php – 如何通过每个对象的属性对对象数组进行排序
发布时间：2020-12-13 22:10:26 所属栏目：PHP教程 来源：网络整理
导读：我有一个从eventbrite.com api返回的数据数组,存储在一个名为$restrictedEvents的变量中,它看起来像下面的数据.这只是为了粘贴的一个事件的代表,但它在完整数组中有大约80个这样的stdClass对象. 我想通过每个stdClass对象中的[title]键按字母顺序对此数组进
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我有一个从eventbrite.com api返回的数据数组,存储在一个名为$restrictedEvents的变量中,它看起来像下面的数据.这只是为了粘贴的一个事件的代表,但它在完整数组中有大约80个这样的stdClass对象.
我想通过每个stdClass对象中的[title]键按字母顺序对此数组进行排序.我尝试过使用： usort($restrictedEvents,"title"); 但是,这会返回以下错误： Warning: usort() [function.usort]: Invalid comparison function in model.php on line 109 我的猜测是它无法找到标题键,因为它处于下一级别.关于我出错的地方以及我如何按标题排序的任何指示都将非常感激.非常感谢. Array
(
[4791063199] => stdClass Object
(
[box_header_text_color] => 393837
[link_color] => EE6600
[box_background_color] => FFFFFF
[box_border_color] => D9D4D0
[timezone] => Europe/London
[organizer] => stdClass Object
(
[url] => http://www.eventbrite.com/org/2866607767
[description] =>
[long_description] =>
[id] => 2866607767
[name] => B&Q Manifestival
)
[background_color] => E3DFDC
[id] => 4791063199
[category] =>
[box_header_background_color] => F0ECE9
[capacity] => 20
[num_attendee_rows] => 0
[title] => Closed Event Test
[start_date] => 2012-11-07 19:00:00
[status] => Live
[description] => Lorem ipsum
[end_date] => 2012-11-07 21:00:00
[tags] =>
[timezone_offset] => GMT+0000
[text_color] => 393837
[title_text_color] =>
[password] =>
[tickets] => Array
(
[0] => stdClass Object
(
[ticket] => stdClass Object
(
[description] =>
[end_date] => 2012-11-07 17:00:00
[min] => 1
[max] => 1
[price] => 0.00
[quantity_sold] => 0
[visible] => true
[currency] => GBP
[quantity_available] => 20
[type] => 0
[id] => 15940001
[name] => Manifestival Event
)
)
)
[created] => 2012-11-07 10:40:36
[url] => http://www.eventbrite.com/event/4791063199
[box_text_color] => 393837
[privacy] => Private
[venue] => stdClass Object
(
[city] =>
[name] => HR Training Room
[country] =>
[region] =>
[longitude] => 0
[postal_code] =>
[address_2] =>
[address] =>
[latitude] => 0
[country_code] =>
[id] => 2619469
[Lat-Long] => 0.0 / 0.0
)
[modified] => 2012-11-07 10:47:20
[repeats] => no
)
解决方法
要使用的第二个参数应该是一个函数.请参阅
http://php.net/manual/en/function.usort.php.您需要将其传递给以下函数：
function cmp($a,$b)
{
return strcmp($a->title,$b->title);
}
我想你会把它称为usort($restrictedEvents,“cmp”);. （编辑：李大同） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |