- json_decode: documentation ( source)
- json_encode: documentation ( source)
- usort: documentation ( source)
<?php
function bla($a, $b) {
if ($a < $b) return -1;
if ($a == $b) return 0;
if ($a > $b) return 1;
}
$data = json_decode('{
data: [[47,47,21],[20,12,4],[6,76,91],[38,30,60],[57,98,64],[61,17,80],[83,60,13],[67,78,75],[64,12,10],[30,77,82]]
}');
usort($data->data, 'bla');
echo json_encode($data);