Getting variable value from PHP with jQuery

Question

So how do i get variable value from php file with jquery...? the jquery code is in other file (tpl)

for example i have register.php and register.tpl (template file f

Answer 1

Either you make a Jquery Ajax Request that will request a php page which will return whatever you want or you echo a javascript variable with php

<?php 
  echo '<script> var javascript_variable = "whatever"; </script>'; 
?>

Answer 2

Best bet is to output the PHP variable as a hidden field or a JavaScript variable:

<input type="hidden" id="my_var" name="my_var" value="<?php echo($my_var); ?>" />

// access it like this:    
alert($('#my_var').val());

or

<script type="text/javascript">
    var my_var = <?php echo($my_var); ?>;
</script>

// access it like this
alert(my_var);

That should do it :-)

Answer 3

It will work if you do

echo "1";

and then

if(result == "1") {

If it doesn't (but I've checked on a code of mine without the quotes, it didn't work, with, it was ok), check the response from Firebug console.

Answer 4

In situations where my company's application needs to call Jquery on a dynamic element and we have the Jquery call IN the php file we'll directly call php in the Jquery call.

For example:

alert($('#').val());

Not for all situations, certainly. If you have to call a variable where you don't have PHP access to the file (possibly such as a .tpl file, depending on your setup) you might resort to setting a hidden input as detailed above.