What is the use of php?

The role of php: 1. PHP is standardized and the syntax is simple and easy to learn, and can dynamically generate web pages; 2. PHP can be used in multiple sections such as bulletin boards, query forms, and shopping carts. It will be used in various dynamic Web applications. Used by the page generation application.

The operating environment of this article: windows7 system, PHP7 version, DELL G3 computer.

Is php useful? What is php used for? Many people who have just come into contact with PHP don’t know what PHP can do. The following PHP Chinese website will introduce PHP to you in detail.

1: What is PHP

PHP is a server-side scripting language that can dynamically generate web pages. Compared with other programming languages, PHP is more standardized and its syntax is simple and easy to learn. It is also a scripting language commonly used for web application development, including WordPress, because it is easy to link with databases such as MySQL.

2: The difference between HTML·JavaScript and PHP

When PHP dynamically generates a web page, HTML statically displays the web page. A static web page is a page that displays the same page no matter who sees it, and a "dynamic web page" is a page whose display content changes depending on the time and situation of access. HTML can be generated and displayed dynamically.

One of the main features of PHP is to fix incompatible HTML text. In addition to PHP, JavaScript is also a programming language commonly used for web page generation. Although PHP is a server-side language, JavaScript is considered A client language. In other words, PHP processing is on the web server side, JavaScript processing is performed by the user's browser of that web page, and server-side PHP can use a database such as MySQL on the server side.

Three: What can be done with PHP

PHP can be used in bulletin boards, query forms, and shopping carts. It will be used in various web pages that require dynamic The build application uses. WordPress is also an application that uses PHP. Users use WordPress to create web pages, and PHP will generate HTML and display it. PHP can allow processing, such as displaying as a new article every time the user publishes an article, or automatically changing the article to be introduced as a related article.

Four: PHP rules

PHP extension is .php, syntax:

<?php
 echo &#39;<p>Hello World</p>&#39;; 
?>

If you want to comment multiple lines, please enclose them In "/*XXX*/" (XXX part is a comment).

The above is a complete introduction to the use of php. If you want to know more about php tutorial, please pay attention to the php Chinese website.

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