Is php a backend or a frontend?

php is an open source general-purpose computer scripting language, which belongs to the back-end language; PHP is a language with a wide range of applications, especially in network program development; PHP is mostly run on the server side. PHP code is used to generate web pages for browsers to read. In addition, it can also be used to develop command-line scripts and client-side GUI applications.

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PHP (full name: PHP: Hypertext Preprocessor, that is, "PHP: "Hypertext Preprocessor") is an open source general-purpose computer scripting language, especially suitable for web development and can be embedded in HTML. The syntax of PHP draws on the characteristics of popular computer languages ​​such as C language, Java and Perl, making it easy for ordinary programmers to learn. The main goal of PHP is to allow web developers to quickly write dynamic pages, but PHP is also used in many other areas.

PHP was originally developed by Lerdorff in 1995; the PHP standard is now maintained by the PHP Group. PHP uses PHP License as the license agreement, but because this agreement restricts the use of the PHP name, it is incompatible with the open source license agreement GPL.

PHP has a wide range of applications, especially in the development of web programs. Generally speaking, PHP is mostly run on a web server, and the web pages browsed by users are generated by running PHP code. PHP can run on most servers and operating systems. According to statistics from April 2013, PHP has been installed on more than 244 million websites and 2.1 million servers.

PHP has a dedicated official porting and compilation project on Windows, and provides different version support through multiple VC compiler versions and thread safety features.

Application

PHP is a language with a wide range of applications, especially in network program development. Generally speaking, PHP is mostly run on the server side. By running PHP code, web pages are generated for browsers to read. In addition, it can also be used to develop command-line scripts and client-side GUI applications. PHP can run on many different servers, operating systems, and platforms, and can also be combined with many database systems. There is no cost to use PHP. The official organization PHP Group provides complete program source code, allowing users to modify, compile, and expand it for use.

Grammar

PHP’s syntax refers to Perl and C language, and can be integrated into HTML. The following is a simple Hello World code:

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