a::last PHP Method

    static function last($array)
    {
        return array_pop($array);
    }

 public function testSort()
 {
     $users = $this->users;
     $users = a::sort($users, 'username', 'asc');
     $first = a::first($users);
     $last = a::last($users);
     $this->assertEquals('mary', $first['username']);
     $this->assertEquals('peter', $last['username']);
 }