How can developers ensure that the PHP files they are redirecting to actually exist and prevent 404 or 500 errors when implementing URL rewriting in PHP?

Developers can ensure that the PHP files they are redirecting to actually exist by checking if the file exists using the `file_exists()` function before including or requiring it. This can help prevent 404 or 500 errors when implementing URL rewriting in PHP. 

$requested_file = $_SERVER['REQUEST_URI'];
$file_path = $_SERVER['DOCUMENT_ROOT'] . $requested_file;

if (file_exists($file_path)) {
    include($file_path);
} else {
    // Handle error, redirect to a 404 page, or display an error message
}

Keywords

URL rewriting PHP files exist 404 errors 500 errors

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