How can PHP developers effectively handle header redirection errors?

When handling header redirection errors in PHP, developers can effectively check for headers already sent before attempting to perform a redirection. This can be done by using the `headers_sent()` function to determine if headers have already been sent to the browser. If headers have been sent, developers can use alternative methods such as JavaScript or meta tags to redirect the user. 

if (!headers_sent()) {
    header('Location: new_page.php');
    exit();
} else {
    echo '<script>window.location = "new_page.php";</script>';
    exit();
}

Keywords

header redirection PHP developers error handling HTTP status codes ob_start

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