Question

Can I access the value of a javascript function from outside the function like if I had a function

<script> function test_tree(opt) {     val = opt; } </script> 

Can I access the val value from outside the test_tree function or is there a way to access it from PHP code?

I need to be able to access a value from the javascript code in PHP code.

Answer 1

Set the value to a hidden field, and read hidden field in your server side code.

<input type='hidden' id='myVariable'> 

In your function :

document.getElementById('myVariable').value = val;