my code here: i try to use sort function but not success. this is my working array code :

MY code desplay output not sorted order:

```
<?php

 foreach($aCities as $key=>$val)
 {
     foreach($diskspace[$val] as $key=>$val2)
     {
         if(isset($val2['data']))
         {
             //'MBytes %.f'=155.000000%;
             preg_match("/'(.*?)ytes \%.f'=(.*?)\%;/",$val2['data'],$aVal);
             echo($val.' '.ceil($aVal[2]).' '.$aVal[1].'<br />');
         }
     }
 }
?>

```

Code OUTPUT:

```
S 3 MB
T 6 MB
I 10 MB

```

i need output in DESC(MemorySize) order like :

```
I 10 MB
T 6  MB
S 3  MB

```