I know this question has been asked before, but not in this context (OOP):
class XYZ {
public function index() {
$array = [
[
'id' => 1,
'name' => 'Alpha'
],
[
'id' => 2,
'name' => 'Beta'
],
[
'id' => 3,
'name' => 'Gamma'
]
];
$newArray = usort($array, 'modify');
return $newArray;
}
public function modify($a, $b) {
return $b['name'] - $a['name'];
}
}
This indexAction returns an empty array, and I am not sure why.
Over here within your usort function the second parameter consist of two values first one ClassName and the other one functionName so your second parameter looks like as
usort($array,['ClassName','functionName']);
Which in your case it'll be like as
usort($array,['XYZ','modify']);