What are some common pitfalls when creating hyperlinks in PHP templates?

One common pitfall when creating hyperlinks in PHP templates is not properly escaping the URL parameters, which can lead to security vulnerabilities such as cross-site scripting attacks. To solve this issue, always use the `htmlspecialchars()` function to escape any user input that is used in the URL.

<a href="<?php echo htmlspecialchars($url); ?>">Link</a>