如何在php中对多键进行排序？

这是我的数组输入

Array ( [0] => stdClass Object (    [Id] => 18 
                                [AccNo] => 1 
                                [Title] => Hardware 
                                [Description] => Mobile. 
                                [ManuDate] => 8th July 1942 
                                [MusCat] => Album 
                                [month] => 7 
                                [date] => 8 ) 
     [1] => stdClass Object (   [Id] => 20 
                                [AccNo] => 2 
                                [Title] => Food 
                                [Description] => Apple. 
                                [ManuDate] => 27th July 1942 
                                [MusCat] => Album 
                                [month] => 7 
                                [date] => 27 )
     [2] => stdClass Object (   [Id] => 24 
                                [AccNo] => 3 
                                [Title] => Hardware 
                                [Description] => Computer. 
                                [ManuDate] => 2nd July 1942 
                                [MusCat] => Album 
                                [month] => 7 
                                [date] => 2 )
     [3] => stdClass Object (   [Id] => 56 
                                [AccNo] => 4 
                                [Title] => Hardware 
                                [Description] => Printer 
                                [ManuDate] => 1942 
                                [MusCat] => Album 
                                [month] => 
                                [date] => 0 ) 
       [4] => stdClass Object ( [Id] => 105 
                                [AccNo] => 5 
                                [Title] => Object 
                                [Description] => Chair. 
                                [ManuDate] => 1942 
                                [MusCat] => Album 
                                [month] => 
                                [date] => 0 ) ) 

---

我想要像这样的输出

    0   8th July 1942       Hardware        Mobile
    1   27th August 1942    Food            Apple
    2   2nd July 1942       Hardware        Computer
    3   1942                Hardware        Printer
    4   1942                Object          Chair

如何在php中对多键进行排序？ 我是Php的初学者。我在php中使用了以下代码，但Output将无法正确执行。如果是datewise或monthwise排序，输出将正确。否则（按日期或按月份），输出将不正确。请帮助任何解决方案

 Id Date                Title               Description
************************************************************
3   1942                Hardware             Printer
4   1942                Object               Chair
2   2nd July 1942       Hardware             Computer
0   8th July 1942       Hardware             Mobile
1   27th August 1942    Food                 Apple

usort（$value['year']，函数（$a，$b）{
如果（$a->date==$b->date）返回0；
返回$a->date<$b->date？-1:1；
});     
usort（$value['year']，函数（$a，$b）{
如果（$a->month==$b->month）返回0；
返回$a->month<$b->month？-1:1；
});

以下代码执行此操作。将文本日期解析为Unix时间戳

usort($value['year'], function ($a, $b) {
     if ($a->date == $b->date) return 0;                    
    return $a->date < $b->date ? -1 : 1;
});     

usort($value['year'], function ($a, $b) {
    if ($a->month == $b->month) return 0;
    return $a->month < $b->month ? -1 : 1;
 });

---

您可以简单地在MySQL中使用

order by

子句，而不是在PHP中对其进行排序QueryEAR看起来不像DB中的日期字段，在MySQL中将其设置为日期字段，然后再设置为

order by

？如果您仍想在php中执行此操作，则year不是有效的datetime，因此您需要检查此字段是否为year并将其转换为date，然后compare.date应具有year或date。我得分月分日。无法在QueryTanks中按日期排序以供参考。我找到了解决办法。我将manudate转换为日期格式，如1942-07-02或1942-01-01或1942-08-27。我添加了tempyear键属性并在函数date\u compare（$a，$b）{$t1=strottime（$a->tempyear）；$t2=strottime（$b->tempyear）；返回$t1-$t2；}usort（#数组，'date\u compare'）；

usort($value['year'], function ($a, $b) {
     if ($a->date == $b->date) return 0;                    
    return $a->date < $b->date ? -1 : 1;
});     

usort($value['year'], function ($a, $b) {
    if ($a->month == $b->month) return 0;
    return $a->month < $b->month ? -1 : 1;
 });

usort($array, function($v1, $v2) {
    $d1 = strlen($v1->ManuDate) === 4 ? '01-01-' . $v1->ManuDate : $v1->ManuDate;
    $d2 = strlen($v2->ManuDate) === 4 ? '01-01-' . $v2->ManuDate : $v2->ManuDate;
    return strtotime($d1) - strtotime($d2);
});