Communication between the Browser and the Server
Explore how to use browser developer tools to observe communication between the browser and server. Learn about HTTP requests, responses, status codes such as 200 and 404, and how servers handle resource requests. This lesson helps you understand essential web communication for building dynamic PHP applications.
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Developer tools
Most browsers offer “developer tools” for observing the communication between the browser and the server. In Firefox, you can find them by opening the top-right menu (three horizontal bars):
Network panel
Then you should select Web Developer. A new menu shows up with a list of topics that might be interesting for you. From this list, select Network. You should see a new window docked at the bottom of the screen:
As the message in this new panel tells you: you should first reload the page. You could refresh ...