How to pass the javascript value to a PHP variable?

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Actually, I want to get the inner text of clicked button store it in a variable and pass the value to a php variable. Everything is fine but the problem comes during passing the javascript value to php variable. If I assign a custom value to the variable then the value will be passed but the value of the inner text of the button is not passing.
Here is my code:

What I have tried:

HTML

<html>
<button id="btn">esteem</button>

<button id="btn">aqas</button>

<button id="btn">umar</button>

</html>

<script>
var buttons = document.querySelectorAll("[id='btn']");
var buttontext;
for(var i=0; i<buttons.length; i++){
    buttons[i].addEventListener("click", function(){buttontext=this.innerHTML;
   // alert(buttontext);
    console.log(buttontext)
   }
  )
}
<?php 
             $ff ="<script>document.write(buttontext);</script>";             
          ?>
</script>

Posted 2-Feb-19 23:57pm

Member 13776396

Updated 18-Dec-19 23:19pm

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Bryian Tan · Answer 1 · 2019-02-03T12:37:00

Is tough to guess what exactly your application is doing by looking at a little bit of code. I would recommend the following just based on what posted here.

1. Add a hidden field

HTML

<input type="hidden" id="btnClickedValue" name="btnClickedValue" value="" />

2. Store the button inner text into a hidden field each time the button clicked

JavaScript

document.getElementById("btnClickedValue").value = buttontext;

3. Then, on the backend / php side, you can write something like below to get the button innerText

PHP

echo $_POST['btnClickedValue'];

Again, this is just based on what posted here.