```
$array = array(
   'list1 - 1',
   'list7 - 1',
   'list5 - 2',
   'list3 - 1'
);

```

I need sort to this array numerically. The function should check the value after the equal sign for sorting.

result:

```
list1 - 1
list7 - 1
list3 - 1
list5 - 2

```

In the above result, the order is not changed either alphabetically or numerically until `list[5]`. How do I do this?