How to sort array using object element in php?

Question

I have following php array object:

"requests": [
{           
   "id": 111,
   "time: 123123123,
   "data": "testc"
},    
{                  
   "id":  200 ,
   "time: 433123123,
   "data": "testb"
},    
{
   "id":  300 ,
   "time:  33123123,
   "data": "testb"
}
]

I want to sort it by requests->time only. How to do it?

I don't want sort by id. All data should be sort as per time ASC.

http://stackoverflow.com/questions/16306416/sort-php-multi-dimensional-array-based-on-key — sozkul, Jul 25 '16 at 12:14
Use [usort()](http://www.php.net/manual/en/function.usort.php) — Mark Baker, Jul 25 '16 at 12:15
if you are geting this data from query then use `ORDER BY time ASC` there only. otherwise use `usort()` — Alive to die - Anant, Jul 25 '16 at 12:16
get reference here http://stackoverflow.com/questions/2699086/sort-multi-dimensional-array-by-value — Munish Chechi, Jul 25 '16 at 12:21
Using objects (as asked) - maybe interesting? https://eval.in/611600 — Ryan Vincent, Jul 25 '16 at 14:19

score 2 · Answer 1 · answered Jul 25 '16 at 12:18

supposing you have that array in a $requests variable, the following should work

<?php
    function cmp($a, $b)
    {
        return strcmp($a["time"],$b["time"]);
    }
    usort($requests, "cmp");

    //print for test
    while (list($key, $value) = each($requests)) {
        echo "\$requests[$key]: " . $value["time"] . "\n";
    }

?>

score 1 · Accepted Answer · answered Jul 25 '16 at 17:44

You have to use your own sort method with usort()

Solution :

<?php
function sortByTimeASC($a, $b)
{
    if ($a->time == $b->time) {
        return 0;
    }
    return ($a->time < $b->time) ? -1 : 1;
}

$a = json_decode('[{"id": 111,"time": 123123123,"data": "testc"},{ "id":200 ,"time":433123123,"data":"testb"},{"id":300,"time":33123123,"data":"testb"}]');

usort($a, "sortByTimeASC");
print_r($a);
?>

Live example

How to sort array using object element in php?

2 Answers2