What are PHP headers and how do they work?

What are PHP headers and how do they work?

PHP headers are used to send raw HTTP headers to the client. They control how the browser handles the response.

Can you give me an example of how to use headers in PHP?

Sure! You can use the header() function. For example, header('Location: http://example.com'); redirects the user.

Are there any headers that I should avoid using?

Yes, avoid sending headers after output has been sent to the browser. It will cause a 'headers already sent' error.

What are some common headers I should know about?

Common headers include Content-Type, Content-Length, and Cache-Control. They help define the response.