Passing variable from javascript to php without using window.location -


I am creating a text box by clicking the Add Dynamically button. In this, I want to increase a count variable when click the add button. How can I get this count value in my PHP file? I have tried the window, but it is not working. My code is: 

  & lt; Script & gt; Var counter = 1; Generate function () {var count = counter; Answer:    
 
 
 in the php file  
  $ count_val = $ _GET ['js_var'];

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