How to call a JS function in two ways?

Question

PHP

There was a problem, you need to call the js function in two different ways, starting from the GET request, that is, if there is $_GET['id'] then the function should be loaded on page load (automatically), if not, then by clicking on the element.

What can you advise?

Answer 1

<script>
function rar() {
  alert('Rar!');
}
</script>

<script>
<?php
if(isset($_GET['id'])) {
  echo "rar();";
} else {
  echo "$('#element').click(rar);";
} ?>
</script>