关于mid函数的用法问题，mid函数不带$符号的，是不是可以直接返回数字呢？能不能指定mid函数的返回值类型，mid%行不行？
http://bbs.ixpub.net/forum.php?mod=viewthread&tid=6194052
Actually I really don't fucking know what 'mid' function do you mean.
PHP Function List mid doesn't exist. Closest matches: