How do I pass parameter from javascript into php function

Question

Javascript function which pass parameter into a php function. My javascript code is below

function add_card(card_listt,card_number){  
   var card = card_listt;
   var num = card_number;
   //document.write(card+num);
   for (var i = 0; i < num; i++) {
      var avrl = "http://192.168.27.123/?Command=add:"+card[i]+","; 
      document.write('<?php get_data($avrl); ?>'); // Here is Problem
      document.write('<?php add(1,2); ?>'); //It works fine If I use  
   }
}

my php function is below. when I use only document.write('<?php add(1,2);?>'); function then it works properly. But when I use document.write('<?php get_data($avrl); ?>'); function then it does not works.

<?php

    function get_data($url) {
       $curl_handle=curl_init();
       $timeout = 20;
       curl_setopt($curl_handle, CURLOPT_URL,$url);
       curl_setopt($curl_handle, CURLOPT_CONNECTTIMEOUT, 2);
       curl_setopt($curl_handle, CURLOPT_RETURNTRANSFER, 1);
       curl_setopt($curl_handle, CURLOPT_USERAGENT, 'Welcome');
       $data = curl_exec($curl_handle);
       //return $data;
       echo $data;
   }

   function add($a,$b){
      $c = $a + $b;
      echo $c;
   }

?>

@M Sumon You cannot call a php function like that. `avrl` is a javascript variable not a php variable. — Ayush, Feb 26 '17 at 05:47
document.write(''); it works fine. But it's above not working. — , Feb 26 '17 at 05:49
Check this link http://stackoverflow.com/questions/1917576/how-to-pass-javascript-variables-to-php — Ayush, Feb 26 '17 at 05:50
@MSumon `document.write('');` this works fine because the values are static. You cannot pass a variable from javascript to PHP. Javascript is client side and PHP is server side. Use ajax to send data to server side. — Ayush, Feb 26 '17 at 05:51

score 0 · Answer 1 · answered Feb 26 '17 at 07:26

Use $_GET append your value to the url like http://www.example.com/someurl?myvar=myvalue in this case your url should be http://www.example.com/someurl?avrl=myvalue.

Then replace your document.write('<?php get_data($avrl); ?>'); with document.write('<?php get_data($_GET['avrl']); ?>');

Vasilij Altunin · Answer 2 · 2017-02-26T07:01:23.097

-1

Try read this or this, but i strongly recommend you to begin use jQuery, you can do such things with it not wasting time writing huge amount of code, for example here

edited Feb 26 '17 at 07:01

answered Feb 26 '17 at 05:59

Vasilij Altunin

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How do I pass parameter from javascript into php function

2 Answers2