passing php variable to javascript [duplicate]

Question

I.ve this thing in php

$v = "test";

How do i pass this to javascript

I did like this

 <script>
  var t = <?php echo $v; ?>
 </script>

I'm passing that t to URL But ii says undefined

Answer 1

If you look at the source of the page in your browser (with your first attempt), you see:

<script>
 var t = test
</script>

And from here, you could guess what's amiss.

Answer 2

<script>
 var t = "<?php echo $v; ?>";
</script>

Answer 3

Try this:

 <script>
  var t = '<?php echo $v; ?>';
 </script>

Answer 4

<?php
    echo "<script type='text/javascript'>var t = '$v';</script>";
?>

Javascript runs clientside and php runs server side so you can't just pass one straight through to the other - they don't run at the same time. You can use php to create javascript to run later though.