在PHP中对工作日时间组合数组进行排序

Question

I have an array in the form:

    $sortme = array(
        'Monday 10:00',
        'Friday 12:00',
        'Tuesday 14:00',
        'Monday 08:00',
        'Wednesday 11:00',
    );

The number of elements is unknown (so I couldn't use the uksort approach with a reference array for the order of weekdays as Mark suggested here). I want the result to be sorted chronologically and always starting with Monday like this:

    $sorted = array(
        'Monday 08:00',
        'Monday 10:00',
        'Tuesday 14:00',
        'Wednesday 11:00',
        'Friday 12:00',
    );

Is there an elegant way to do it without resorting to transform the array to a two-dimensional one and iterating? This would have been my only idea so far.

Answer 1

You can use usort function in PHP, which will do sorting using user-specified comparison function. The code below is probably not the most efficient, but it'll produce the correct result.

$sortme = array(
        'Monday 10:00',
        'Friday 12:00',
        'Tuesday 14:00',
        'Monday 08:00',
        'Wednesday 11:00',
    );

usort($sortme, function($a, $b) { return strcmp(date('N H:i', strtotime($a)), date('N H:i', strtotime($b))); });
print_r($sortme);