【正文】 t to produce byte code for processing by the Zend Engine, giving improved performance over its interpreter predecessor At the time I write this, PHP is the latest stable release available, but versions and 6 are both scheduled for release in the near future. PHP 4 is still in use on a number of servers, but support has been discontinued. Many hosting panies let developer use either PHP 4 or PHP 5 on their sites. PHP Origin PHP originally stood for “Personal Home Page” and was released as a free, open source project. It began in 1994 as a set of Common Gateway Interface binaries written in the C programming language by the Danish/Greenlandic programmer Rasmus Lerdorf. Lerdorf initially created these Personal Home Page Tools to replace a small set of Perl scripts he had been using to maintain his personal homepage. The tools were used to perform tasks such as displaying his r233。t enough in order to build dynamic web sites. To use PHP on a web site, you need a server that can process PHP scripts. Apache is a free web server that, once installed on a puter, allows developers to test PHP scripts locally。 this makes it an invaluable piece of your local development environment. Additionally, dynamic websites are dependent on stored information that can be modified quickly and easily。sum233。 it is especially wellsuited for creating dynamic web pages. The scripting language features integrated support for interfacing with databases such as MySQL, which makes it a prime candidate for building all manner of web applications, from simple personal web sites to plex enterpriselevel applications. Unlike HTML, which is parsed by a browser when a page loads, PHP is preprocessed by the machine that serves the document (this machine is referred to as a server). All PHP code contained with the document is processed by the server before the document is sent to the visitor’s browser. PHP is a scripted language, which is another great advantage for PHP programmers. Many programming languages require that you pile files into machine code before they can be run, which is a timeconsuming process. Bypassing the need to pile means you’re able to edit and test code much more quickly. Because PHP is a serverside language, running PHP scripts on your local machine requires installing a server on your local machine, as well. The examples in this book rely on the Apache web server to deliver your web pages. Serving web pages with Apache HTTP Server is the most popular web server on the web。 it also facilitates initial form validation and simplifies making improvements to the user interface. However, using clientside scripts requires that the users have JavaScript turned on or that their browsers support the script you have written. This means you should not use clientside scripts for user authentication or the handling of anything sensitive, due to the user’s ability to modify and/or disable your clientside scripts. Serverside scripting is performed on the site`s hosting server before the page is delivered to the user. This means that any changes that must be made by the script require a page refresh. Using serverside scripting is great for user authentication, saving changes to database information, retrieving entries for display, and many other tasks. The downside of serverside scripts lies mainly in the required page refresh. Because the script is processed before it is delivered to the browser, the user doesn’t have access to the inner workings. This makes serverside scripts the best choice for handling any sensitive information. 6 中 文翻譯 設(shè)置 PHP開(kāi)發(fā)環(huán)境 對(duì)于一個(gè)不折不扣新手來(lái)說(shuō) ,將 一個(gè)工作中的開(kāi)發(fā)環(huán)境放在一起是可怕的。 為什么你需要 Apac