What are the different ways to call PHP scripts using buttons in a web project?

To call PHP scripts using buttons in a web project, you can use various methods such as using HTML forms with method="post" or method="get", using AJAX to make asynchronous requests to the PHP script, or using JavaScript to trigger a PHP script execution when a button is clicked. Example PHP code snippet using HTML form: ```html <form action="script.php" method="post"> <button type="submit">Submit</button> </form> ``` Example PHP code snippet using AJAX: ```javascript <script> function callScript() { var xhttp = new XMLHttpRequest(); xhttp.onreadystatechange = function() { if (this.readyState == 4 && this.status == 200) { console.log(this.responseText); } }; xhttp.open("GET", "script.php", true); xhttp.send(); } </script> <button onclick="callScript()">Call Script</button> ``` Example PHP code snippet using JavaScript: ```html <button onclick="window.location.href='script.php'">Call Script</button> ```