Call PHP function on Button click using jquery ajax

This can be achieved using ajax, lets see an example,

File : index.php

<html>
<head>
<title>Example</title>


<script>


$('.myButton').click(function() {

 $.ajax({
  type: "POST",
  url: "phpFileWithFunction.php"
}).done(function( resp ) {
  alert( "Hello! " + resp );
});    

});

</script>
</head>
<body>

<input type="button" value="Click" id="myButton" />
</body>

File : phpFileWithFunction.php

<?php

class Foo {
	
function myFunc() {
	
	return "This data is received from PHP function on button click!";
}

}

$fooObj = new Foo();

echo $fooObj->myFunc();

?>

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