What potential issue could arise when using the PHP Header function within a switch case statement?

When using the PHP Header function within a switch case statement, the potential issue that could arise is that the Header function must be called before any actual output is sent to the browser. If the Header function is called within a switch case after some output has already been sent, it will result in a "Headers already sent" error. To solve this issue, you can use output buffering to capture the output and prevent it from being sent until the Header function is called.

ob_start();

switch ($someVariable) {
    case 'option1':
        // logic
        break;
    case 'option2':
        // logic
        break;
    default:
        // default logic
}

ob_end_clean();

header("Location: somepage.php");
exit;