What are some alternative methods or tools that can be used to customize templates in PHP applications if the built-in functionality is not working properly?

If the built-in functionality for customizing templates in PHP applications is not working properly, one alternative method is to use a third-party template engine such as Twig. Twig provides a more robust and flexible way to create and customize templates in PHP applications. Another option is to manually manipulate the HTML output using PHP functions to achieve the desired customization.

// Example using Twig template engine
require_once 'vendor/autoload.php';

$loader = new Twig_Loader_Filesystem('path/to/templates');
$twig = new Twig_Environment($loader);

$template = $twig->load('template.twig');
echo $template->render(['variable' => 'value']);