Get Javascript variable as an index with PHP array in Javascript

Question

Want javascript variable as index variable in php array in javascript.

Code is not working .....

<script>
     var total = <?php echo count($resvalue); ?> ; //$resvalue is an array holding the values are 1,2,3,4. total will hold count of that array.
     for(var j=0;j<total;j++)
     {
          <php echo $resvalue[j]; ?> // where j is javascript variable and $resvalue is PHP array
     }
 </script>

JavaScript is executed on the client side, PHP on the server side. You can't mix and match. — Robby Cornelissen, Aug 09 '17 at 06:17
You can solve your problem by either sending the `$resvalue` to the client using API call, or by using full php code — samAlvin, Aug 09 '17 at 06:19
Don't know your use case. For the simple code you're showing, you can easily just do everything in PHP. — Robby Cornelissen, Aug 09 '17 at 06:19
can you clarify your question. also, you have an error in your code... ` — oldboy, Aug 09 '17 at 06:20
may this thread can help https://stackoverflow.com/questions/5618925/convert-php-array-to-javascript — raksa, Aug 09 '17 at 06:21
I am new to PHP . the question is can i use Javascript variable in php array as index variable in javascript for loop ? — Natavar Ghodasara, Aug 09 '17 at 06:22
No you can't. PHP is exectuted on the server before the page is loaded. — Starfish, Aug 09 '17 at 06:23

score 2 · Accepted Answer · answered Aug 09 '17 at 06:26

You cannot read values in a php array from javascript. Instead echo the array and turn it into a javascript array and let javascript do the count.

<script>
     var resvalue = [<?php echo $resvalue; ?>]; // or something like this
     for(var j=0; j < resvalue.length; j++)
     {
          // your value is available in the js-array
          // resvalue[j]
     }
</script>

Get Javascript variable as an index with PHP array in Javascript

1 Answers1