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@ 2020-02-05T23:55:25Z

<?php


$array = [
    '2020-02-07' => ['09:00' => 1500, '10:30' => 1500, '11:00' => 1500],
    '2020-02-08' => ['09:00' => 1500, '09:30' => 1500, '10:00' => 1500],
    '2020-02-09' => ['09:00' => 1500, '09:30' => 1500, '11:00' => 1500],
    '2020-02-10' => ['09:00' => 1500, '10:30' => 1500, '11:30' => 1500]
];

$result = array();
foreach ($array as $date => $arr) {
    $next_included = false;
    $times = array_keys($arr);
    $count = count($times);
    for ($i = 0; $i < $count - 1; $i++) {
        $current = $times[$i];
        $next = $times[$i+1];
        if (strtotime($next) - strtotime($current) == 1800) {
            $result[$date][] = "$current - $next";
            $next_included = true;
        }
        else {
            if (!$next_included) $result[$date][] = $current;
            $next_included = false;
        }
    }
    if (!$next_included) {
        $result[$date][] = $next;
    }
}
print_r($result);

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [2020-02-07] => Array ( [0] => 09:00 [1] => 10:30 - 11:00 ) [2020-02-08] => Array ( [0] => 09:00 - 09:30 [1] => 09:30 - 10:00 ) [2020-02-09] => Array ( [0] => 09:00 - 09:30 [1] => 11:00 ) [2020-02-10] => Array ( [0] => 09:00 [1] => 10:30 [2] => 11:30 ) )

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Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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