how to call php function in javascript with parameters code example

Example 1: call php function in js

<script>
  var phpadd= <?php echo add(1,2);?> //call the php add function
  var phpmult= <?php echo mult(1,2);?> //call the php mult function
  var phpdivide= <?php echo divide(1,2);?> //call the php divide function
</script>

Example 2: javascript call php function with parameters

var deleteClient = function(id) {
    $.ajax({
        url: 'path/to/php/file',
        type: 'POST',
        data: {id:id},
        success: function(data) {
            console.log(data); // Inspect this in your console
        }
    });
};