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@ 2023-09-30T21:21:06Z

<?php

$dates = [
    '2010-12-30',
    '2011-01-01',
    '2011-01-02',
    '2011-01-03',
    '2011-01-06',
    '2011-01-06',
    '2011-01-07',
    '2011-01-10',
];

function formatRange(object $start, ?object $end = null): string
{
    $last = $end ?? $start;
    return sprintf(
        '%s%s',
        $start->format('l j M'),
        $last === $start
            ? ''
            : ' to ' . $last->format('l j M')
    );
}

$result = [];
foreach ($dates as $date) {
    $obj = new Datetime($date);
    if (isset($temp['start'])) {
        if ($obj->diff($temp['end'] ?? $temp['start'])->days > 1) {
            $result[] = formatRange(...$temp);
            $temp = ['start' => $obj];
        } else {
            $temp['end'] = $obj;
        }
    } else {
        $temp['start'] = $obj;
    }
}
if (isset($temp)) {
    $result[] = formatRange(...$temp);
}
var_export($result);

Output for git.master_jit, git.master, rfc.property-hooks: array ( 0 => 'Thursday 30 Dec', 1 => 'Saturday 1 Jan to Monday 3 Jan', 2 => 'Thursday 6 Jan to Friday 7 Jan', 3 => 'Monday 10 Jan', )

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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