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例子:
function foo($whatever){ // ... do stuff here } // call the function +foo(1234);
+如果使用(or -, !etc)调用它,我可以从我的函数中找出它吗?
+
-
!
未使用 调用该函数+。调用该函数,然后将结果用作 的操作数+。
所以不行。