Php 在Laravel中按日期订购数组

我想按字段日期订购一个包含客户评论的数组。从最新日期到最早日期

$testimonials = array:356 [▼
0 => array:4 [▼
    "comment" => "blahblahblahblahblah"
    "name" => "John"
    "date" => "12/04/2019"
]
1 => array:4 [▼
  "comment" => "blah blah blah blah blah"
  "name" => "Franky V"
  "date" => "13/05/2019"
]
2 => array:4 [▼
  "comment" => "lololololol"
  "name" => "Peter"
  "date" => "06/03/2020"
]
3 => array:4 [▼
  "comment" => "blahblahblahblahblahblahblahblahblah"
  "name" => "Hugo"
  "date" => "24/01/2019"
]
....

我想得到这个结果：

$testimonials = array:356 [▼
  0 => array:4 [▼
    "comment" => "lololololol"
    "name" => "Peter"
    "date" => "06/03/2020"
  ]
  1 => array:4 [▼
    "comment" => "blah blah blah blah blah"
    "name" => "Franky V"
    "date" => "13/05/2019"
  ]
  2 => array:4 [▼
    "comment" => "blahblahblahblahblah"
    "name" => "John"
    "date" => "12/04/2019"
  ]
  3 => array:4 [▼
    "comment" => "blahblahblahblahblahblahblahblahblah"
    "name" => "Hugo"
    "date" => "24/01/2019"
  ]

如何在我的Laravel控制器内或使用PHP实现这一点

编辑：我正在尝试usort，但我弄错了

public function getTrollingDates($testimonials) {
        $currentdate = new DateTime();
        $currentdate = $currentdate->format('Y-m-d');

        foreach($testimonials as &$testimonial) {
            $testimonial['date'] = $this->getRandomDate('2019-01-01',$currentdate);
        }

        $testimonials = usort($testimonials, 'compare');



        return $testimonials;
    }


    public function compare($a, $b)    {
        return  strtotime($b['date']) - strtotime($a['date']) ;
    }

此操作将返回以下错误：

usort() expects parameter 2 to be a valid callback, function 'compare' not found or invalid function name

---

假设

$estimonials

是一个集合对象，您可以使用按日期降序排序

<?php 

$testimonials = $testimonials->sortByDesc(function($a){
    return DateTime::createFromFormat('d/m/Y',$a['date']);
});

dd($testimonials);

---

在
Laravel
中，您可以像这样做：

$array = collect($testimonials)->sortBy('date')->reverse()->toArray();

在
PHP
中，您可以使用
usort
实现相同的功能

function compare($a, $b)    {

   // if you want to sort by ascending
    return  strtotime($b['date']) - strtotime($a['date']) ;

    //if you want to sort by descending order
    // return  strtotime($a['date'])  - strtotime($b['date'])  ;
}
usort($my_array, 'compare');

@AntonioMorales Change
usort（$commissional，'compare'）到
usort（$commentials，$this->compare）现在抛出这个新错误：未定义的属性：App\Http\Controllers\WebController:：$compare@AntonioMorales代替
function
try
anonymous function
：
usort（$commentials，function（$a，$b）{返回strotime（$b['date']）-strotime（$a['date']）；}）不工作：usort（）希望参数2是有效的回调，没有数组或字符串提供给entry此：
$array=collect（$commentials）->sortBy（'date'）->reverse（）->toArray（）@AntonioMorales什么样的新日期？它在我的机器上运行良好。我想这个链接就是你的答案。我想这篇文章会对你有所帮助。