What are the best practices for concatenating strings in PHP to create dynamic URLs?

When creating dynamic URLs in PHP by concatenating strings, it is important to properly handle the concatenation of variables and static parts of the URL. One common method is to use the dot (.) operator to concatenate strings in PHP. This ensures that the variables are properly inserted into the URL without any syntax errors.

// Example of concatenating strings to create a dynamic URL
$base_url = "https://www.example.com/";
$page_name = "products";
$category_id = 5;

$url = $base_url . $page_name . "?category=" . $category_id;

echo $url;