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@ 2019-12-06T13:53:12Z

<?php

$data = [
  [
    "id" => "3f57dc7c-a698-e911-a95e-000d3a454330",
    "date" => [
        [
        "start_date" => "23.11.2020 07:00",
        "end_date" => "04.12.2020 16:00"
      ],
      [
        "start_date" => "02.03.2020 07:00",
        "end_date" => "13.03.2020 16:00"
      ],
      [
        "start_date" => "06.01.2020 07:00",
        "end_date" => "14.02.2020 21:00"
      ],
      [
        "start_date" => "20.01.2020 07:00",
        "end_date" => "28.02.2020 07:00"
      ],
      [
        "start_date" => "23.03.2020 07:00",
        "end_date" => "03.04.2020 15:00"
      ],
      [
        "start_date" => "31.08.2020 06:00",
        "end_date" => "09.10.2020 15:00"
      ],
      [
        "start_date" => "12.10.2020 06:00",
        "end_date" => "23.10.2020 15:00"
      ]
    ]
  ]
];

foreach ($data as $entry) {
    $tmp[] = usort($entry['date'], function($a, $b) {
        $a = DateTime::createFromFormat('d.m.Y H:i', $a['start_date']);
        $b = DateTime::createFromFormat('d.m.Y H:i', $b['start_date']);
       /* if ($a == $b) {
            return 0;
          }

        return $a < $b ? -1 : 1;*/
        return $a <=> $b;
    });
}
var_dump($data[0]['date']);

Output for git.master, git.master_jit, rfc.property-hooks: array(7) { [0]=> array(2) { ["start_date"]=> string(16) "23.11.2020 07:00" ["end_date"]=> string(16) "04.12.2020 16:00" } [1]=> array(2) { ["start_date"]=> string(16) "02.03.2020 07:00" ["end_date"]=> string(16) "13.03.2020 16:00" } [2]=> array(2) { ["start_date"]=> string(16) "06.01.2020 07:00" ["end_date"]=> string(16) "14.02.2020 21:00" } [3]=> array(2) { ["start_date"]=> string(16) "20.01.2020 07:00" ["end_date"]=> string(16) "28.02.2020 07:00" } [4]=> array(2) { ["start_date"]=> string(16) "23.03.2020 07:00" ["end_date"]=> string(16) "03.04.2020 15:00" } [5]=> array(2) { ["start_date"]=> string(16) "31.08.2020 06:00" ["end_date"]=> string(16) "09.10.2020 15:00" } [6]=> array(2) { ["start_date"]=> string(16) "12.10.2020 06:00" ["end_date"]=> string(16) "23.10.2020 15:00" } }

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2022-12-01 RFC: Property hooks - included in PHP 8.4
2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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