PHP newbies on the road (2)_PHP tutorial

Why choose PHP

2. Competitors: ASP, mod_perl, JSP

There are many technologies used to implement interactive dynamic web pages, among which CGI is also called Common Gateway Interface. , is the standard programming interface between external programs and WEB servers, but CGI programs bring too many shortcomings; Perl solves the problems in CGI very well and is used to drive complex WEB technology; Microsoft's ASP ( The emergence of Active Server Pages), with its easy to use, easy to write programs and strong support for microsoftware, made ASP suddenly become the darling of many professional programmers and non-professional programmers; Middleware and Allaire's Cold Fusion are another A solution, and Cold Fusion has a proven and reliable search engine component; JSP is a new generation site development language launched by Sun, and so on. There are so many dynamic WEB technologies, you may ask: "Why should I choose PHP?"

Before answering this question, let us first take a look at the advantages between ASP, PHP and JSP shortcoming.

2.1 About ASP

ASP is loved by many friends due to its simple functions and practicality, coupled with the strong support of MS, it can be said to be one of the most popular languages ​​​​for website development nowadays. , with the help of MS's Com+ technology, it can realize almost all the functions that can be realized in C/S. It can be said that it is indeed quite competitive. The code implementation of ASP is also very simple. The InterDev provided by MS is based on RAD, making the development of ASP popular all over the country overnight. But its shortcoming is that due to MS's long-term domineering style, it can only run on MS platforms, so it is difficult for people to easily accept it in critical applications.

2.2 About JSP

JSP is a new generation website development language launched by Sun. It completely solves a common problem of ASP and PHP - script-level execution (now PHP4 is also available in Zend With the support of Java, it can be compiled and run). With its extraordinary achievements in Java, Sun has made Java a new fruit in addition to Java applications and Java Applets, which is Jsp--Java Server Page. Jsp can complete powerful website programs with the support of Serverlet and JavaBean.

As far as I know, JSP is based on Java, so Java programmers can easily start coding. ASP is just a general engine with the ability to support multiple languages, but the default and most commonly used one is VBScript. mod_perl is as powerful as Perl, just faster.

For ASP, JSP, PHP, etc., which language is better? Different people have different opinions. But one thing we must be clear about: for ASP, JSP, etc., do you know how expensive it will be to buy them and how expensive and powerful hardware they require. If you have any neutral views (for example, not influenced by SUN and Microsoft's millions of dollars), please let me know by the way.

2.3 About PHP

PHP adheres to the GNU style of Linux. With the open source code, it has quickly become one of the most widely used website production languages ​​in the world. With the help of C++ format and the concept of reference class, the reproducible application of code is extremely simple. Coupled with its close cooperation with Linux, Apache and MySql, there is no problem with critical applications (the famous Sina uses Php). At the same time, the official version of the core engine of PHP's fourth generation Zend (PHP4) has also been released. The core of the entire program has been greatly improved, making the execution speed of PHP programs faster. The efficiency of PHP after optimization has been better than that of traditional CGI or ASP and other programs. And because PHP is free, anyone can visit the PHP WEB site and download the complete source code. More importantly: code written in PHP will execute faster, and PHP code that can achieve the same function can run on different WEB servers and different operating systems without changing it. With this alone, you already have enough reasons to choose PHP.