Numerically sorting arrays output [duplicate] - php

Question

This question already has answers here:
How do I Sort a Multidimensional Array in PHP [duplicate]
(10 answers)
Closed 8 years ago.
I'm trying to sort the output value that's returned by greatest to least.
Here's an example of the array:
array(
'ACTION' => 'getsupportdepartments',
'RESULT' => 'success',
'TOTALRESULTS' => 2,
'DEPARTMENTS' => array(
'DEPARTMENT' => array(
'ID' => 2,
'NAME' => 'Sales',
'AWAITINGREPLY' => 5,
'OPENTICKETS' => 5
),
'DEPARTMENT1' => array(
'ID' => 1,
'NAME' => 'Support',
'AWAITINGREPLY' => 15,
'OPENTICKETS' => 15
The code I'm using is:
if(!empty($_GET['sort'])) {
$tmpArray = array();
foreach($arr['WHMCSAPI']['DEPARTMENTS'] as $key => $value) {
$tmpArray[$value['AWAITINGREPLY']] = $value;
}
$arr['WHMCSAPI']['DEPARTMENTS'] = $tmpArray;
($_GET['sort'] == 'desc') ? krsort($arr['WHMCSAPI']['DEPARTMENTS']) : ksort($arr['WHMCSAPI']['DEPARTMENTS']);
}
($_GET['sort'] == 'desc') ? krsort($arr['WHMCSAPI']['DEPARTMENTS']) : ksort($arr['WHMCSAPI']['DEPARTMENTS']);
foreach($arr['WHMCSAPI']['DEPARTMENTS'] as $department) {
echo $department['NAME'].' - '.$department['AWAITINGREPLY'].'<br />';
}
echo $exc;
However the order of the output from AWAITINGREPLY is not sorting.

Answer 1

No need to reinvent the wheel, there's already a function called usort:
online demo
function sortDepts(array &$arr,$sort="desc")
{
if($sort=="desc")
usort($arr["DEPARTMENTS"],function($a,$b){
return $b["AWAITINGREPLY"]-$a["AWAITINGREPLY"];
});
else
usort($arr["DEPARTMENTS"],function($a,$b){
return $a["AWAITINGREPLY"]-$b["AWAITINGREPLY"];
});
return $arr;
}
Note that anonymous function works in PHP>=5.3. If you need to support 5<=PHP<5.3, you'll need to declare the function first.
Edit:
For 5 < PHP < 5.3:
online demo
function asc($a,$b)
{
return $a["AWAITINGREPLY"]-$b["AWAITINGREPLY"];
}
function desc($a,$b)
{
return $b["AWAITINGREPLY"]-$a["AWAITINGREPLY"];
}
function sortDepts(array &$arr,$sort="desc")
{
if($sort=="desc")
usort($arr["DEPARTMENTS"],"desc");
else
usort($arr["DEPARTMENTS"],"asc");
return $arr;
}
Edit #2:
In case you still need the key (DEPARTMENT,DEPARTMENT1,etc.), use uasort instead of usort (no other code change is required).