What is the security of the website?

Question

What is website security? How to check whether the website is safe or not? Is it important?

Answer 1

I would like to ask VM902:1 Setting data field "collected" to undefined is invalid. How to solve it

Answer 2

Hello, the "Latest Laravek Mall Practical Video Tutorial" http://www.php.cn/course/871.html you posted has the source code. Please give me the source code.

Answer 3

You search for a network security bar on the php Chinese website

Answer 4

Is your code written rigorously?

Answer 5

From your code