What are some potential pitfalls to be aware of when calling PHP functions from links?

One potential pitfall when calling PHP functions from links is the risk of exposing sensitive information or performing unintended actions if the link is accessed by unauthorized users. To prevent this, you can use server-side validation to check user permissions before executing the function. 

// Example of using server-side validation to check user permissions before executing a PHP function from a link
if ($_SESSION['user_role'] == 'admin') {
    // Call the PHP function only if the user has the necessary permissions
    your_php_function();
} else {
    // Redirect the user or display an error message
    header('Location: unauthorized.php');
    exit();
}

Keywords

PHP functions links security vulnerabilities input validation cross-site scripting

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