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This article mainly explains "php scripting language", the content of the explanation is simple and clear, easy to learn and understand, the following please follow the editor's ideas slowly in depth, together to study and learn "php scripting language" bar!

Php is a scripting language. PHP is an embedded scripting language and an open source scripting language executed on the server side. Its syntax absorbs the characteristics of C language, Java and Perl, and is convenient for learning. It is especially suitable for Web development and can be embedded in HTML. The application areas of PHP are: WEB server, command line scripting, writing desktop applications.

Operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

Php is a scripting language.

The full name of PHP is PHP Hypertext Preprocessor, which means "hypertext preprocessor". It is an embedded scripting language. Because PHP is simple, easy to use, cross-platform, open source and other characteristics, it has become the mainstream website development language. Websites developed using PHP are widely used in various industries.

PHP is a server-side, cross-platform, open source, free scripting language, especially suitable for Web development and can be embedded in HTML.

PHP grammar learned C language, absorbed the characteristics of Java and Perl to develop its own characteristic grammar, and continuously improved itself according to their strengths, such as java's object-oriented programming, the main goal of which was to allow developers to quickly write high-quality web websites. PHP supports both object-oriented and process-oriented development and is very flexible in use.

PHP language features:

Open source and free

PHP is an open source software project with a large audience and many developers, Linux + Nginx + Mysql + PHP is its classic installation and deployment, related software are all open source free, so the use of PHP can save a lot of genuine licensing fees. However, as an open source software, PHP lacks the support background of large technology companies, and its negative voice on the Internet is enduring, but the reality of its continuous iteration and continuous performance improvement is encouraging, and the PHP community has responded strongly to all kinds of questions with practical actions.

Fast and efficient

The kernel of PHP is the foundation of C language, which is efficient and can be used to develop high-performance extension components. The core of PHP contains more than 1000 built-in functions with comprehensive functions and concise out-of-the-box code.

PHP array supports dynamic expansion and associative arrays with numbers, strings or mixed key names, which can greatly improve the efficiency of development.

PHP is a weakly typed language with high compiler pass rate and faster development efficiency than other strongly typed languages.

PHP natural hot deployment. Hot deployment is completed by code file overwriting in php-fpm operation mode.

After more than 20 years of development, PHP can find a large number of reference materials on the Internet for reference and learning.

Performance improvement

The higher the PHP version, the higher its overall performance. According to the official introduction, PHP7.0.0 [14] has improved two times the performance of PHP5.6, and PHP7.4 is about 30% faster than PHP7.0. The performance of PHP7.4 8.0 is about 10% better than that of PHP7.4.

PHP 8.0 introduces JIT compiler features along with a variety of new language features, such as named parameters, associative types, annotations, Constructor Property Promotion, match expressions, nullsafe operators, and improvements to the type system, error handling, and consistency. PHP has its own core development team, which maintains the frequency of releasing one large version in five years and two small versions in one month, and the latest version is PHP8.08.

Cross platform

Each platform has a corresponding version of php interpreter, which means that the binary code (PHP interpreter) of the target platform is compiled for different platforms. The program developed by php can run on windows, linux, unix and other operating systems without modification.

Resident memory

In php-cli mode, programs can be resident in memory, and various variables and database connections can be stored in memory for a long time to achieve resource reuse. A more common approach is to write a cli framework combined with swoole components.

Page life cycle

In php-fpm mode, all variables are page-level, whether global variables or static members of the class, will be emptied after the page execution, low requirements for programmers, very little memory, especially suitable for the development of small and medium-sized systems.

The application field of PHP

1) WEB server

PHP is particularly suitable for website development, and there is no language to compete with it (according to the authoritative technology website w3techs.com, PHP is used by 79% of websites).

Of course, the opportunity for PHP to show its talents is not only in website development, but also in game development, advertising system development, API interface development, mobile background development, and internal OA system development.

Nowadays, Wechat development is extremely popular, and PHP is also the best development tool. Coupled with the birth of react native framework and Hybrid App, PHP programmers can develop mobile App.

2) Command line script

We can also run PHP scripts in command-line mode, which does not require server support or browser trigger, but only PHP parsers in command-line script mode. This method is usually used for daily running scripts on Windows and Linux platforms, such as some daemons. Of course, these scripts can also be used to handle simple text.

3) write desktop applications

PHP may not be the best language for developing desktop applications with a graphical interface, but if users are very proficient in PHP and want to use some of PHP's advanced features in client applications, they can use PHP-GTK to write these programs.

PHP-GTK is an extension of PHP, using PHP-GTK to create stand-alone GUI (graphical user interface) applications, such as mp3 players, text editors, database backend, and so on. You can download PHP-GTK from http://gtk.php.net/.

Description: so far, there is still no programming language on the market that is easier to use than PHP. Even the world-famous websites use PHP. Please see the table below.

Serial number website program OS (system) DB (database) 1FACEBOOKPHPLinux+ApacheMySql2GOOGLEPython cluster (self-developed) cluster 3YouTubePython cluster 4Yahooql5 Baidu PHPLinux+Apache cluster 6 Wikipedia PHPLinux+ApacheMySql7 Amazon CGILinuxOracle8Windows LiveASP.NETWindows+IISMsSql9 Tencent QQPHP cluster 10 Taobao PHPLinuxOracle11BlogspotPython cluster 12TwitterRuby unknown NoSql13LinkedInJSP unknown 14BingASP.NETWindows+IISMsSql15 unknown 14BingASP.NETWindows+IISMsSql15 unknown PHP cluster 17MSNASP.NETWindows+IISMsSql18 cluster unknown unknown NginxRedis28ConduitC#.NETWindows+IISMsSql29PinterestPythonFreeBSD+ApacheMySql30FC2 unknown 31delta -searchPython Cluster (self-developed) Cluster 32CraigslistPHPLinux+ApacheMySql33 Tmall PHPLinux+ApacheMySql34BabylonColdFusionWindows+IISMsSql35 Sohu net PHPLinux+ApacheMySql36PayPalJSP unknown 37AdobeAIR unknown 38The Internet Movie DatabaseASP.NETWindows+IISMsSql39 unknown 38The Internet Movie DatabaseASP.NETWindows+IISMsSql39 unknown 40BBC OnlineASP.NETWindows+IISOracle41soso search PHPLinux+Nginx unknown 42Pornhub unknown 43 Phoenix New Media PHPLinux+ApacheMySql44AVG unknown 45AOLJSP unknown 46Blogger unknown 47Go unknown 48 Alibaba JSPUnix+ApacheOracle49 Youku PHPLinux+ApacheMySql50360 Security Center PHPLinux+ApacheMySql

Thank you for your reading, the above is the content of "php scripting language?", after the study of this article, I believe you have a deeper understanding of the problem of php scripting language, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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