Redirecting the User
Our simple script still has one major drawback. The form is rewritten whether or not the user guesses correctly. The fact that the HTML is hard-coded makes it difficult to avoid writing the entire page. We can, however, redirect the user to a congratulations page, thereby sidestepping the issue altogether.
When a server script communicates with a client, it must first send some headers that provide information about the document to follow. PHP usually handles this task for you automatically, but you can choose to send your own header lines with PHP’s header() function.
To call the header() function, you must be sure that no output has been sent to the browser. The first time that content is sent to the browser, PHP sends ...
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