Web servers

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How PHP pages run

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PHP programs run on Web servers. They can work with database servers. PHP can also send email, read and write files, and interact with many kinds of other servers.

The PHP ecosystem

This short chapter is about how you’ll do PHP work. First, it reviews what PHP does. Then it recommends some tools to make your PHP work easier.

How URLs work

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We’ve talked about the layers. On the previous page, we looked at HTML, the main technology of the display layers on the Web.

Let’s put the last three pages together. We’ll track a browser’s request for a page through to the server, and see the server’s response.


How to...