How to execute PHP code within JavaScript

Question

<button type="button" id="okButton" onclick="funk()" value="okButton">Order now </button>
<script type="text/javascript">
    function funk(){
        alert("asdasd");
        <?php echo "asdasda";?>
    }
</script>

When the button is pressed I want to execute PHP code (at this point to echo asadasda)

Answer 1

You could use http://phpjs.org/ http://locutus.io/php/ it ports a bunch of PHP functionality to javascript, but if it's just echos, and the script is in a php file, you could do something like this:

alert("<?php echo "asdasda";?>");

don't worry about the shifty-looking use of double-quotes, PHP will render that before the browser sees it.

as for using ajax, the easiest way is to use a library, like jQuery. With that you can do:

$.ajax({
  url: 'test.php',
  success: function(data) {
    $('.result').html(data);
  }
});

and test.php would be:

<?php 
  echo 'asdasda';
?>

it would write the contents of test.php to whatever element has the result class.