What does php cross-platform mean?

In PHP, cross-platform means that the PHP language can operate on multiple operating systems (platforms). The PHP language does not depend on the operating system or the hardware environment. It can run under various operating systems such as Unix, Linux, Windows, and Mac OS, and can well meet the different needs of website development and construction.

The operating environment of this tutorial: Windows 7 system, PHP version 7.1, DELL G3 computer

PHP's full name is PHP Hypertext Preprocessor, which is "hypertext" Preprocessor" means. It is a cross-platform, open source, free scripting language. Its syntax absorbs the characteristics of C language, Java and Perl. It is easy to learn and widely used. It is mainly suitable for the field of Web development.

One of the advantages of PHP is that it can be cross-platform. So what is cross-platform?

php cross-platform means that the php language can operate on multiple operating systems (platforms). The PHP language does not depend on the operating system or the hardware environment.

The optimal running environment of PHP is Apache MySQL PHP. This running environment can be configured on different operating systems (such as windows, Linux, etc.) and is not restricted by the operating system, so it is called cross-platform.

Several advantages of PHP language

Low learning cost

PHP learning is fast and easy to get started. The development cost is low, the syntax is relatively simple, and it provides a rich class library, such as the GD library for image processing, various encryption extensions (such as OpenSSL and Mcrypt), etc., and many libraries are installed in the PHP environment by default, which can Very convenient to use directly.

Easy to use

PHP combined with Linux, Nginx or Apache, MySQL can easily and quickly build a system. PHP also supports direct calling of system commands, which is convenient You can use code to complete many operations, such as packaging and compression, copy and paste, rename, perform grep query filtering in Linux, etc.

Nginx is a very excellent web server software. It can receive client requests and send PHP files to the PHP program for execution. PHP in Nginx uses fastCGI to run scripts.

Good database support

PHP supports the use of MySQL, MSSQL, SQLite and other databases, among which the combination of PHP and MySQL is the most popular.

Taking MySQL as an example, PHP provides 3 ways to connect to the MySQL database:

• MySQL extension: no longer supported in PHP 5.5 and later versions.

• MySQLi extension: A more secure and efficient extension launched by PHP specifically for connecting to MySQL, and provides some more advanced operations, fully supporting object-oriented.

• PDO extension: A unified solution launched by PHP to link MySQL and other types of databases. It is highly portable and can be used to switch between different types of databases flexibly and conveniently. No more code changes are required.

Support object-oriented

Object-oriented programming (OOP) is the current software development trend, and PHP provides good support for OOP. You can use OOP ideas to perform advanced programming of PHP, which is very meaningful for improving PHP programming capabilities and planning a good web development architecture.

High development efficiency

Because PHP is a scripting language that is interpreted and executed, the program can be executed immediately after writing it, unlike compiled languages ​​such as C, Java, and C. Compile and then execute, which makes PHP development more efficient.

Cross-platform

PHP can run under Unix, Linux, Windows, Mac OS and other systems, and can well meet the different needs of website development and construction.

Rich Ecosystem

As one of the most popular and widely used Web development languages, PHP has a rich ecosystem, with many famous open source frameworks and open source The system is ready for use.

Excellent PHP open source framework:

• Official open source frameworks include Zend Framework, CakePHP, Yaf, Symfony, etc.;

• Third-party open source frameworks include ThinkPHP, Laravel, Yii, etc.

Excellent PHP open source system:

• Open source blog (Blog) systems include WordPress, Z-Blog, emlog, etc.;

• Open source content management systems (CMS) include DedeCMS (Dream Weaver CMS), PHPCMS, EmpireCMS (Empire CMS);

• Open source forum system (BBS ) include Discuz, PHPwind, StartBBS, etc.;

• open source social network systems (SNS) include UCHome, ThinkSNS, etc.;

• open source mall Systems Ecshop, ShopEx, etc.

Based on these excellent open source frameworks and systems, we can easily and quickly build a set of Web sites.

PHP has grown up with the explosion of the Internet. It is a pig standing on the wind and can fly without wings. In the early days of the Internet, the world was dominated by individual webmasters (grassroots webmasters). Many webmasters had dozens or even hundreds of websites (site group play). It is obviously unrealistic for individual webmasters to independently develop a Web system. Yes, they can only choose open source and free systems, and they can launch a website with slight modifications. At this time, PHP becomes the only programming language. Open source systems of other programming languages ​​cannot be compared with PHP.

PHP is a skill that individual webmasters must master, and there is no alternative. In terms of quantity, personal websites in the early days of the Internet accounted for more than 80%, and almost all were built using the PHP open source system. The open source system helps individual webmasters earn their first pot of gold, and individual webmasters also feed back the open source system.

Excellent scalability

Since PHP itself is developed in C language, C language can also be used in some cases that have strict requirements on performance. Write PHP extensions to improve program execution speed.

After we use PHP to write the code for the main business, we then use C language to complete the performance improvement requirements. This can not only ensure the efficiency of software development, but also take into account the efficiency of execution.

In this situation where there is an ultimate pursuit of software development speed and program execution performance, if it is other languages, you may be at a loss or have to start over.

Many users

Many large domestic companies, such as Baidu, Taobao, 360 and other companies, widely use PHP as a development language, and have achieved great results in specific practice. It was a great success and there are many successful experiences to draw from.

Recommended learning: "PHP Video Tutorial"

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