Figure 1-1. Client and server communication without PHP

Here's what's happening in the numbered steps of the diagram:

1. You type www.example.com/catalog.html into the location bar of Internet Explorer.

2. Internet Explorer sends a message over the Internet to the computer named www.example.com asking for the /catalog.html page.

3. Apache, a program running on the www.example.com computer, gets the message and reads the catalog.html file from the disk drive.

4. Apache sends the contents of the file back to your computer over the Internet as a response to Internet Explorer's request.

5. Internet Explorer displays the page on the screen, following the instructions of the HTML tags in the page.

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