这里realpath起啥作用呢
$act_file = realpath(BASE_PATH . '/control/' . $_GET['act'] . '.php');
上面这个写法是在一个方法中，当然作者的目的是引用一个文件的路径，但我不理解的是，为啥加这个realpath呢，当然此函数，手册上说是为了求出绝对路径，可是括号里面的BASE_PATH . '/control/' . $_GET['act'] . '.php'，本身就已是绝对路径了，如再加一个realpath，这不是多吃一举吗，当然我的理解也可能不正确，还望专家指正！
回复讨论(解决方案)
是不是多此一举，那要看 BASE_PATH（基准路径）的值是什么了
至少在你给出的信息中，不能判定 BASE_PATH 一定是绝对路径
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