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橘子（Student ID：146370）

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Course notes

Courses in the relevant section：Simple variables of PHP basic syntax

1、變量不能以數字開頭

2020-02-280個贊

Courses in the relevant section：PHP data type string

雙引號解析變量，變量和字符串拼接不想用.可以在雙引號中用大括號將變量包起來

2020-02-290個贊

Courses in the relevant section：PHP data type NULL type

empty不是只有空返回true，為false也會返回true

2020-03-010個贊