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@ 2020-01-03T10:18:36Z

<?php
$input = array (
   0 =>
     array (
       'values' =>
          array (
            1 => '123456',
            2 => 'Blue',
            3 => 'Container',
            4 => '03-01-2020',  // start date
            5 => '03-01-2021',  // exp date
            6 => '',
            7 => '',
         ),
      ),
   1 =>
     array (
       'values' =>
          array (
            1 => '21312',
            2 => 'Green',
            3 => 'Box',
            4 => '2019-04-12',  // start date
            5 => '',            //exp date
            6 => '',
            7 => '',
          ),
       ),
   2 =>
     array (
       'values' =>
          array (
            1 => '434324',
            2 => 'Orange',
            3 => 'Box',
            4 => '2018-04-28', // start date
            5 => '2019-04-23', // exp date
            6 => '',
            7 => '',
          ),
    ),
);

$expiryDates = array_map(static function ($entry) {
  return strtotime($entry['values'][5]);
}, $input);

echo date('d F Y', max($expiryDates));

Output for git.master, git.master_jit, rfc.property-hooks: 03 January 2021

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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73.42 ms | 405 KiB | 5 Q