What are the advantages and disadvantages of using JavaScript versus PHP headers for redirecting users based on search queries in PHP?

When redirecting users based on search queries in PHP, using JavaScript for redirection can provide a smoother user experience as it happens instantly without a page reload. However, using PHP headers for redirection ensures better SEO optimization as it sends the appropriate HTTP status code to search engines. It is recommended to use JavaScript for client-side redirection and PHP headers for server-side redirection. 

if(isset($_GET['search_query'])) {
    $search_query = $_GET['search_query'];
    
    if($search_query == 'example') {
        header('Location: example.php');
        exit();
    } else {
        header('Location: search_results.php?query=' . $search_query);
        exit();
    }
}

Keywords

JavaScript PHP headers redirecting users search queries advantages disadvantages

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