Briefly describe the development history of PHP technology_PHP tutorial

Everyone is familiar with PHP technology. Let’s review the development history of PHP technology. The last decade of the last century was the most important decade for Web applications from their birth to maturity. In 1990, the world's first Web server was born, and in 1991, the world's first Web browser was born. In the following years, due to the improvement of computer hardware levels, the scale of Web applications also gradually expanded. During this period, many web development languages ​​were also born, among which PHP is a more outstanding web development language. Does the birth of PHP mean that Web applications will move into a new era? Can it withstand the attack of other Web development languages?

PHP technology turns out

In 1994, Rasmus Lerdorf first designed the PHP programming language. In June 1995, Rasmus Lerdorf published the PHP 1.0 announcement on the Usenet news group comp.infosystems.www.authoring.cgi. In this early version, simple functions such as guest book and visitor counter were provided. In mid-1995, the second version of PHP was launched on the market, named PHP/FI (Form Interpreter). In this version, a parser that can handle more complex embedded tag languages ​​has been added. Since then, PHP's influence in dynamic web development has been established.

Since PHP added these powerful features, its usage has skyrocketed. According to preliminary statistics, at the end of 1996, 15,000 Web sites used PHP/FI; and in mid-1997, this number exceeded 50,000.

The success of the first two versions has given PHP designers and users full confidence in the future of PHP. In 1997, the PHP development team added Zeev Suraski and Andi Gutmans (these two people and Rasmus Lerdorf are also known as the three founders of PHP). They volunteered to rewrite the underlying parsing engine, and many others also volunteered. Working with other parts of PHP, PHP has since become a truly open source project. In June 1998, PHP.net released the PHP 3.0 announcement. In this version, PHP can be closely integrated with the Apache server; in addition, it is constantly updated and new features are added; and it supports almost all mainstream and non-mainstream databases; and it has very high execution efficiency. These advantages make In 1999, there were more than 150,000 websites using PHP!

PHP has evolved through three versions and has become a very powerful web development language. This language is very easy to use, and it has a powerful class library, and the naming rules of the class library are also very standardized. Even if you don't understand the functions of some functions, you can guess them through the function names. This makes PHP very easy to learn, and PHP programs can be processed directly using an HTML editor. Therefore, PHP has become very popular after 1998. Many large portals (such as Sina) use PHP as their Web Development language.

PHP technology faces pressure and moves forward bravely

There will never be the only choice in this diverse world. In the following years after the birth of PHP, Web applications were gradually recognized by the majority of users. During this period, some web development languages ​​similar to PHP were also born, the most famous of which are ASP and JSP (ASP and JSP are different from PHP. They are not languages ​​themselves, but a web development technology. ASP can Use JScript or VBScript for development, while JSP can only be developed using Java). ASP was born in 1996, the second year after former Microsoft CEO Bill Gates announced that all Microsoft products would be equipped with Internet capabilities. Although ASP can only run on the Windows platform, due to Microsoft's strong support and the simplicity and ease of use of ASP, this technology has gradually attracted a large number of users from PHP. JSP, which was born in 1998, has strong momentum. Since JSP has almost the same advantages as PHP, and JSP runs on the JVM, its efficiency is theoretically higher than that of PHP. With the birth of these two technologies, PHP is being attacked from both sides.

However, PHP was not to be outdone. After continuous improvement, it finally launched an epoch-making version, PHP4, in May 2000. This version uses the Zend (Zeev + Andi) engine, provides higher performance, and also includes other key features, such as: support for more web servers; HTTP Sessions support; output buffering; more security methods for handling user input and some new language constructs.

The competition of web development languages ​​has also undergone considerable changes since the 21st century. Although ASP won some users at the beginning, because the development languages ​​​​of ASP are JScript and VBScript, it lacks a class library as powerful as PHP and JSP. Although ASP can make up for this shortcoming by calling COM components, this will It's very troublesome. Although JSP has a powerful class library and can be cross-platform, because the Java language is a strongly typed language, and the tags and other specifications defined by JSP are too complex, this makes JSP more complicated to use than PHP. Therefore, PHP was slightly at the top of the Web competition in the last century. But as the 21st century progresses, the situation becomes more complicated.

http://www.bkjia.com/PHPjc/446459.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/446459.htmlTechArticleEveryone is familiar with PHP technology. Let’s review the development history of PHP technology. The last decade of the last century was the most important decade for Web applications from their birth to maturity. In 1990, the world...