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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 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.29, 8.4.1 - 8.4.14, 8.4.16, 8.5.0 - 8.5.1: 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', )
Output for 8.4.15: /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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