Extending PHP

摘要

As my grandfather always says, "If you want something done right, do it yourself." However, these days you often have to rely on third-party tools to help you get your job done. To serve even a simple, static HTML Web page you need to rely on your Web server, which in turn relies on your operating system, and so on. While you can't create all these programs yourself, most of the ones that you rely on-your Web server, for example-provide an API to help you extend and add functionality to these programs, so if they don't meet your needs you can always modify them.