What are the potential pitfalls of trying to execute a PHP function using an onclick event in HTML?

When trying to execute a PHP function using an onclick event in HTML, it's important to remember that PHP is a server-side language and cannot be directly executed in the client-side browser. To solve this issue, you can use AJAX to send a request to a PHP file on the server, which will then execute the desired function. ```html <button onclick="executeFunction()">Click me</button> <script> function executeFunction() { var xhr = new XMLHttpRequest(); xhr.open('GET', 'execute_function.php', true); xhr.send(); } </script> ``` In the `execute_function.php` file on the server, you can then write the PHP code to execute the desired function.