如何为外部javascript文件设置变量？

Question

I am trying to figure out how to set my session_id variable to to be used in an external js file. Here is what I have.

php file:

$output = '<script src="test.js">
     var session_id = '.$_SESSION['id'].'
</script>';
print $output;

js file:

alert(session_id);

With this I am getting an error saying session_id is not defined. Is there a way to pass this info across?

I know I could just setup a hidden input with the info but I am thinking there is a better way of doing it.

Answer 1

Hum, what about:

$output = '<script type="text/javascript> var session_id = '.$_SESSION['id'].'</script><script type="text/javascript" src="test.js"></script>';
print $output;

?