变量作用域

所有声明的变量都局部作用于声明它们的方法:

namespace Test;
class MyClass
{
    public function someMethod1()
    {
        int a = 1, b = 2;
        return a + b;
    }
    public function someMethod2()
    {
        int a = 3, b = 4;
        return a + b;
    }
}