With the rapid development of the Internet, various new technologies emerge in endlessly. Today, PHP is favored by Internet users because of its efficiency. JSP, a new scripting technology similar to ASP and PHP, has joined the Internet dance under the initiative of Sun Microsystems. JSP, with its inherent advantages, soon attracted people's attention. The codes of JSP and PHP are very similar in form. PHP uses scripts similar to C language, while JSP uses JavaScript as script. However, they still have great differences, mainly including the following two points:
1. PHP is stored on the server side in the form of source code and runs in interpreted mode when calling. Every time Website production Calling PHP web pages requires an explanation of the source code, which is slightly inefficient. While JSP is compiled into byte code before execution, and byte code is interpreted and executed by Java Virtual Machine, which is more efficient than source code interpretation: the server also has a cache mechanism for byte code, which can improve the access efficiency of byte code. The JSP page may be slower when it is called for the first time, because it will be compiled into a Cache. It will be much faster to call the page again later.
2. JSP uses JavaBeans to expand complex functions, such as file upload, sending E-mail, and separating business processing or complex computing into independent reusable modules. JavaBean development is a very simple thing for programmers familiar with Java, and there are a large number of JavaBean programs on the Internet that can be used at any time. PHP has no similar function at present. It can be found that JSP is designed to integrate modern advanced network technology into the Web interface, and has very obvious technical advantages. Even so, PHP is no inferior. PHP has no direct component function, but the PHP development team has used many workarounds. For example, the extension module enables PHP to call JavaBean components and COM controls that ASP can use. In the near future, PHP will have its own component functions.
Now there are PHP extension blocks that can compile PHP source code, which can improve the execution efficiency of PHP programs. All this is because PHP is an open source software, and it has a strict development mechanism and a united development team.
