Php 使用数组进行排序,给出未定义的索引
我以下面的数组为例Php 使用数组进行排序,给出未定义的索引,php,multidimensional-array,usort,Php,Multidimensional Array,Usort,我以下面的数组为例 array(3) { ["date"]=> array(6) { [0]=> string(19) "2014-03-12 00:00:00" [1]=> string(19) "2014-03-12 08:30:00" [2]=> string(19) "2014-03-10 08:00:00" [3]=> string(19) "2014-03-11 08:00:00"
array(3) {
["date"]=>
array(6) {
[0]=>
string(19) "2014-03-12 00:00:00"
[1]=>
string(19) "2014-03-12 08:30:00"
[2]=>
string(19) "2014-03-10 08:00:00"
[3]=>
string(19) "2014-03-11 08:00:00"
[4]=>
string(19) "2014-03-11 08:00:00"
[5]=>
string(19) "2014-03-11 17:00:00"
}
["data"]=>
array(6) {
[0]=>
string(115) "
2 tests were booked
"
[1]=>
string(316) "
08:30am
Matamata Class 1 R & F
"
[2]=>
string(319) "
08:00am-04:00pm
Truck Course
"
[3]=>
string(328) "
08:00am-03:30pm
Trade Ed Rot Class 2
"
[4]=>
string(326) "
08:00am-03:30pm
Trade Ed Tga Class 2
"
[5]=>
string(330) "
05:00pm-08:00pm
Tauranga Truck Course
"
}
["ad"]=>
array(6) {
[0]=>
int(1)
[1]=>
int(0)
[2]=>
int(0)
[3]=>
int(0)
[4]=>
int(0)
[5]=>
int(0)
}
}
这是我的职责:
function date_compare($a, $b) {
return strtotime($a['date'])>strtotime($b['date']);
}
我尝试使用以下uasortuasort($dayEvents,'date_compare')按日期/时间对所有数据进行排序代码>但我得到了注意:未定义索引:日期。我已经找了大约一个小时了,运气不好,有人能看出我做错了什么吗
更新:
好的,我已经改变了数组结构,但它仍然没有按日期对数据进行排序
开始阵列:
$dayEvents = array();
$dayEvents['output'] = array();
它是这样分配的:
$dayEvents['output'][]=array('date'=>$dateStamp,'data'=>$dataOutput,'ad'=>$allDay)代码>
示例输出:
array(1) {
["output"]=>
array(6) {
[0]=>
array(3) {
["date"]=>
string(19) "2014-03-12 00:00:00"
["data"]=>
string(115) "
2 tests were booked
"
["ad"]=>
int(1)
}
[1]=>
array(3) {
["date"]=>
string(19) "2014-03-12 08:30:00"
["data"]=>
string(316) "
08:30am
Matamata Class 1 R & F
"
["ad"]=>
int(0)
}
[2]=>
array(3) {
["date"]=>
string(19) "2014-03-12 08:00:00"
["data"]=>
string(319) "
08:00am-04:00pm
Truck Course
"
["ad"]=>
int(0)
}
[3]=>
array(3) {
["date"]=>
string(19) "2014-03-12 08:00:00"
["data"]=>
string(328) "
08:00am-03:30pm
Trade Ed Rot Class 2
"
["ad"]=>
int(0)
}
[4]=>
array(3) {
["date"]=>
string(19) "2014-03-12 08:00:00"
["data"]=>
string(326) "
08:00am-03:30pm
Trade Ed Tga Class 2
"
["ad"]=>
int(0)
}
[5]=>
array(3) {
["date"]=>
string(19) "2014-03-12 17:00:00"
["data"]=>
string(330) "
05:00pm-08:00pm
Tauranga Truck Course
"
["ad"]=>
int(0)
}
}
}
要对其进行排序的语句:
if(count($dayEvents['output'])>1) {
uasort($dayEvents, 'date_compare');
}
以及功能本身:
function date_compare($a, $b) {
return strtotime($a['date']) > strtotime($b['date']);
}
我不再得到未定义的索引错误,但它仍然没有按日期排序?有人知道我做错了什么吗?嗯ad
只是一个带零的数组
您正在尝试对日期数组进行排序吗
<?php
$dayEvents = array(
"date" => array(
"2014-03-12 08:30:00",
"2014-03-10 08:00:00",
"2014-03-11 08:00:00",
"2014-03-11 08:00:00",
"2014-03-11 17:00:00"
),
"ad" => array(
0,
0,
0,
0,
0
)
);
function date_compare($a, $b) {
return strtotime($a) > strtotime($b);
}
usort($dayEvents['date'], 'date_compare');
var_dump($dayEvents);
$a['date']
是一个数组。很抱歉,我试图按时间对数据进行排序,我已将示例更新为它实际输出的内容。我认为我没有正确构建阵列,但不太确定。:)
array(2) {
["date"]=>
array(5) {
[0]=>
string(19) "2014-03-10 08:00:00"
[1]=>
string(19) "2014-03-11 08:00:00"
[2]=>
string(19) "2014-03-11 08:00:00"
[3]=>
string(19) "2014-03-11 17:00:00"
[4]=>
string(19) "2014-03-12 08:30:00"
}
["ad"]=>
array(5) {
[0]=>
int(0)
[1]=>
int(0)
[2]=>
int(0)
[3]=>
int(0)
[4]=>
int(0)
}
}