Introduction to PHP pre-defined variables

What are the predefined variables for PHP? This article mainly share with you the introduction of PHP predefined variables, I hope to help everyone.

1, the predefined variables are not user-defined variables, but PHP-defined variables, users directly use the line, commonly used there are 9 predefined variables

1. $_get (): Receive data from GET mode

2, $_post (): Receive the data transmitted by the POST method

3, $_request (): Receive data transmitted in any way

4, $_server: Server and client-related information

5. $GLOBALS: Global Data

6, $_cookie:cookie storage data to the user's computer

7, $_session:session the user data stored on the server, and can be used across files

8, $_files: File Upload

9, $_env: Environment variables

Different data is encapsulated in the 9 pre-defined variables above.

Related recommendations:

PHP pre-defined variables detailed

PHP predefined variable instance details PHP pre-defined variables