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  1. <?php
  2.  
  3. $data = [
  4. 	[
  5. 		'foo'	=> 1,
  6. 		'created_at'	=> DateTime::createFromFormat('d.m.Y', '04.03.2014')
  7. 	],
  8. 	[
  9. 		'foo'	=> 3,
  10. 		'created_at'	=> DateTime::createFromFormat('d.m.Y', '01.01.2014')
  11. 	],
  12. 	[
  13. 		'foo'	=> 2,
  14. 		'created_at'	=> DateTime::createFromFormat('d.m.Y', '24.12.2014')
  15. 	]
  16. ];
  17.  
  18. print_r($data);
  19.  
  20. uasort($data, function($a, $b) {
  21. 	$first = $a['created_at']->format('U');
  22. 	$second= $b['created_at']->format('U');
  23.  
  24. 	if ($first == $second) {
  25.         return 0;
  26.     }
  27.     return ($first < $second) ? -1 : 1;
  28. });
  29.  
  30. print_r($data);
Success #stdin #stdout 0.02s 20520KB
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Standard input is empty
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Array
(
    [0] => Array
        (
            [foo] => 1
            [created_at] => DateTime Object
                (
                    [date] => 2014-03-04 05:51:47
                    [timezone_type] => 3
                    [timezone] => UTC
                )

        )

    [1] => Array
        (
            [foo] => 3
            [created_at] => DateTime Object
                (
                    [date] => 2014-01-01 05:51:47
                    [timezone_type] => 3
                    [timezone] => UTC
                )

        )

    [2] => Array
        (
            [foo] => 2
            [created_at] => DateTime Object
                (
                    [date] => 2014-12-24 05:51:47
                    [timezone_type] => 3
                    [timezone] => UTC
                )

        )

)
Array
(
    [1] => Array
        (
            [foo] => 3
            [created_at] => DateTime Object
                (
                    [date] => 2014-01-01 05:51:47
                    [timezone_type] => 3
                    [timezone] => UTC
                )

        )

    [0] => Array
        (
            [foo] => 1
            [created_at] => DateTime Object
                (
                    [date] => 2014-03-04 05:51:47
                    [timezone_type] => 3
                    [timezone] => UTC
                )

        )

    [2] => Array
        (
            [foo] => 2
            [created_at] => DateTime Object
                (
                    [date] => 2014-12-24 05:51:47
                    [timezone_type] => 3
                    [timezone] => UTC
                )

        )

)
https://ideone.com/dSfnHe
language:
PHP (php 7.3.5)
created:
11 years ago
visibility:
secret

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