Array
(
[0] => Array
(
[dateTime] => 2011-10-18 0:0:00
[chanl1] => 20.7
[chanl2] => 45.4
[chanl3] =>
)
[1] => Array
(
[dateTime] => 2011-10-18 0:15:00
[chanl1] => 20.7
[chanl2] => 45.4
[chanl3] =>
)
[2] => Array
(
[dateTime] => 2011-10-18 00:14:00
[chanl1] => 20.7
[chanl2] => 33.8
[chanl3] =>
)
[3] => Array
(
[dateTime] => 2011-10-18 00:29:00
[chanl1] => 20.6
[chanl2] => 33.9
[chanl3] =>
)
我想根据[dateTime]对上述数组进行排序,最终的输出应该是：
Array
(
[0] => Array
(
[dateTime] => 2011-10-18 0:0:00
[chanl1] => 20.7
[chanl2] => 45.4
[chanl3] =>
)
[1] => Array
(
[dateTime] => 2011-10-18 00:14:00
[chanl1] => 20.7
[chanl2] => 33.8
[chanl3] =>
)
[2] => Array
(
[dateTime] => 2011-10-18 0:15:00
[chanl1] => 20.7
[chanl2] => 45.4
[chanl3] =>
)
[3] => Array
(
[dateTime] => 2011-10-18 00:29:00
[chanl1] => 20.6
[chanl2] => 33.9
[chanl3] =>
)
有没有人知道怎么做？谢谢！
使用
usort() function与自定义变体：
$arr = array(...);
usort($arr,function($a,$b) {
$ad = new DateTime($a['dateTime']);
$bd = new DateTime($b['dateTime']);
if ($ad == $bd) {
return 0;
}
return $ad < $bd ? -1 : 1;
});
DateTime类具有超载比较运算符(<> ==).
