如何从服务器（10.0.2.2）执行Android Call php功能？

With reference to this link open a url on click of ok button in android

i want to call php function in my xampp server by the builder button click "ok"

Uri uri = Uri.parse("10.0.2.2/sth.php?runFunction=true");
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
startActivity(intent);

PHP:

<?php 
if($_GET["runFunction"] == true){
    myFunction();
}

function myFunction(){
    ...
}
?>