What is the Php syntax and PHP file extension?

1: What is PHP

PHP is a server-side scripting language. Application for developing static or dynamic websites. PHP stands for Hypertext Preprocessor, which in the early days stood for Personal Home Page. [Recommended reading: What is php]

2: What is a scripting language?

A scripting language is a language that interprets scripts at runtime. Scripts are often embedded in other software environments. The purpose of scripts is usually to enhance performance or perform routine tasks for an application. Server-side scripting are interpreted on the server, whereas client scripts are interpreted by the client application.

PHP is a server-side script that is interpreted on the server, while JavaScript is a client-side script that is interpreted by the client browser. Both PHP and JavaScript can be embedded into HTML pages.

Three: Php syntax and PHP file extension

1. Syntax

<？PHP
echo“你好世界”;
？>

When learning the PHP language, you can do it without knowing HTML Learn PHP, but it is recommended that you know at least the basics of HTML.

Database Management System DBMS is used for database-driven applications, but for more advanced topics such as interactive applications and web services, you will need JavaScript and XML to work with.

2. Extensions

File extensions and tags In order for the server to identify our PHP files and scripts, we must save the files ending in ".php".

Four: What are the advantages of PHP

1.PHP is open source and free.

2. Compared with other languages ​​(such as JSP, ASP, etc.), the learning curve is shorter

3. Most web servers support PHP by default, unlike other languages ​​(such as IIS that require ASP).

4. Other benefits gained by using PHP is that it is a server-side scripting language, which means you only need to install it on the server. Client computers requesting resources from the server do not need to install PHP; there is only one web browser The device is enough.

5.PHP is cross-platform, which means that applications can be deployed on a variety of different operating systems, such as Windows, Linux, Mac OS, etc.

The above is a detailed explanation of Php syntax and what PHP file extensions are. If you want to know more about php programming introduction, please pay attention to the php Chinese website.

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