Differences before get and post, cookie and session, include, and require

I. The differences between include and require in PHP

1. Include is loaded at the time of use

2. Require load from the beginning

3. The _once suffix indicates that the load is not loaded

4. When the include introduces a file, it encounters an error, gives a hint, and continues to run the following code

5. When the require introduces the file, it will give a prompt and stop running the following code.

Second, the difference between the cookie and session:

1. The data of the cookie is stored on the browser and the session data is stored on the server;

2. Cookies are not very secure, others can analyze cookies stored locally and make cookie spoofing, and if they consider security, use the session

3. Session will be stored on the server for a certain period of time, when the increase in access, will be compared to occupy your server performance considerations with server performance, you should use cookies

4. A single cookie cannot hold more than 4K of data, and many browsers limit a maximum of 20 cookies per site

5. Personal advice:

Storing important information, such as login information, as a session

Other information that needs to be retained can be placed in a cookie

Three, get and post introduction

1. Get is the plaintext transfer data, post is ciphertext transmission

2. Get is not transmitted in a secure manner, and the value of the transferred value is displayed in the URL box during transmission

3. Get transmits a small amount of data, and post can transmit a large amount of data

4. Get is the default method from

Differences before get and post, cookie and session, include, and require