How to sort array by startTime?

Question

How would I sort this array by startTime?

Code:

function arraySorter($a, $b) {
    return strtotime($a->startTime) - strtotime($b->startTime);
}   

usort($this->meetingSlotsTaken, 'arraySorter');

echo "<pre>";
    print_r($this->meetingSlotsTaken);
echo "</pre>";

I'm doing my code dynamically, I don't want to manually enter the keys like the following:

usort($this->meetingSlotsTaken[0]['2016-10-07 14:10:00'], 'arraySorter');

Print out:

try usort($this->meetingSlotsTaken[0]['2016-10-07 14:10:00'], 'arraySorter'); — Nikhil Vaghela
– Nikhil Vaghela, Commented Oct 21, 2016 at 10:14

verhie · Accepted Answer · 2016-10-21 10:18:09Z

1

You need to sort the array in the array in the array:

foreach($this->meetingSlotsTaken as $k1 => $v1){
    foreach($v1 as $k2 => $v2){
        usort($this->meetingSlotsTaken[$k1][$k2], 'arraySorter');
    }
}

answered Oct 21, 2016 at 10:18

verhie

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Comments

Rijin · Accepted Answer · 2016-10-21 10:23:21Z

Use this example :

$array = array(
    0 => array(
        'name' => 'Name0',
        'date' => '2016-10-10 15:30:00'
    ),
    1 => array(
        'name' => 'Name1',
        'date' => '2016-10-11 15:30:00'
    ),
    2 => array(
        'name' => 'Name3',
        'date' => '2016-10-13 15:30:00'
    ),
    3 => array(
        'name' => 'Name4',
        'date' => '2016-10-05 15:30:00'
    ),
    4 => array(
        'name' => 'Name5',
        'date' => '2016-10-09 15:30:00'
    )
);

$temp_array = array();
foreach ($array as $key => $value) {
    $temp_array[$key] = $value['date'];
}

asort($temp_array); // arsort() for reverse order

$output = array();
foreach ($temp_array as $key => $value) {
    $output[] = $array[$key];
}

echo "<pre>"; print_r($output);

Result :

Array
(
    [0] => Array
        (
            [name] => Name4
            [date] => 2016-10-05 15:30:00
        )

    [1] => Array
        (
            [name] => Name5
            [date] => 2016-10-09 15:30:00
        )

    [2] => Array
        (
            [name] => Name0
            [date] => 2016-10-10 15:30:00
        )

    [3] => Array
        (
            [name] => Name1
            [date] => 2016-10-11 15:30:00
        )

    [4] => Array
        (
            [name] => Name3
            [date] => 2016-10-13 15:30:00
        )

)

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