PHP Order array by multiple elements - Date and Time based sorting

Question

I have an array as follows:

$array = array (
    array(  'Day' => 'Monday',
            'Start' => '0830',
            'End' => '1730'),

    array(  'Day' => 'Monday',
            'Start' =>'1730',
            'End' => '2130'),

    array(  'Day' => 'Tuesday',
            'Start' => '0600',
            'End' => '1100'),

    array(  'Day' => 'Tuesday',
            'Start' => '0600',
            'End' => '0900'),           
);

I'm trying to work out how to sort this so the results are sorted first by Day and then by the earliest Start, then End.

Using the above array, the results would be:

Monday 0830-1730
Monday 1730-2130

Tuesday 0600-0900
Tuesday 0600-1100

Can any advise the best way to do this. Thanks

Answer 1

因此，如@Daniel所写，仅使用usort函数，您还需要检查如何将Day表示为int-为此，请检查日期函数手册-以我的解决方案N格式使用，因此，星期一-1 ...星期日-7逻辑用于排序只是一个https://en.wikipedia.org/wiki/Polynomial

<?php

$array = array (
    array(  'Day' => 'Monday',
            'Start' => '0830',
            'End' => '1730'),

    array(  'Day' => 'Monday',
            'Start' =>'1730',
            'End' => '2130'),

    array(  'Day' => 'Tuesday',
            'Start' => '0600',
            'End' => '1100'),

    array(  'Day' => 'Tuesday',
            'Start' => '0600',
            'End' => '0900'),           
);

usort($array, function($a, $b) {
    return (date("N", strtotime($a['Day'])) <=> date("N", strtotime($b['Day']))) * 100 +
           ($a['Start'] <=> $b['Start']) * 10 +
           ($a['End'] <=> $b['End']);
});

var_dump($array);

演示