PHP language specification-PHP Tutorial

PHP language specification. PHP language specification: 1. variable names in PHP are case-sensitive, but function names, class names, and method names are case-insensitive, however, we recommend that you use case-sensitive PHP language specifications and PHP language specifications.
PHP language specifications:

1. variable names in php are case-sensitive, but function names, class names, and method names are case-insensitive. However, we recommend that you use case-sensitive variables.

2. php code must be written in (Php tag), enable tag (

3. each line of php code ends with a semicolon, and the last line can be omitted.

4. if a php file is composed of pure php code, the php end mark can be omitted. we recommend that you omit it. if it is omitted, the last line must have a plus sign.

5. the php file name cannot contain Chinese characters, and the path cannot contain Chinese characters,

6. Access to PHP files must pass through the server (by domain name)

Example:

PHP language specifications: 1. variable names in php are case-sensitive, but function names, class names, and method names are case-insensitive, but it is recommended to be case-sensitive...