current community

your communities

more stack exchange communities

company blog
Stack Exchange Inbox Reputation and Badges
tour help
stack overflow careers
Sign up ×
Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them, it only takes a minute:
up vote 0 down vote favorite
1

This is a part of the code in a 'process.php' file:

echo "<script type='text/javascript'> percYes = ".$yes."</script>"
echo "<script type='text/javascript'> percNo = ".$no."</script>"

This 'process.php' file runs in the background (using jQuery/ajax) when the user clicks a butto. The 'echoed' html above replaces the contents of a div. So essentially what I'm trying to do is update some Javascript variables using a background php call, the above solution does not seem to work though, i.e. the script is not being ran once it is placed in the div.

A bonus problem involves using these updated Javascript variables to update a graph. I have a workng javascript graphing function, but the problem is getting the new graph to replace the old one (or just update it, if that's possible).

Thanks.

share|improve this question
    
what function are you using to make the ajax call. To parse the data as script , I guess $.load needs to be used and not $.ajax. – Neeraj Jan 17 '12 at 11:31
    
I really don't know too much about this stuff, but I'm using xmlhttp.open() and xmlhttp.send(). I'll have a look into $.load. EDIT: Wow, $.load looks perfect. – user1104147 Jan 17 '12 at 11:34
    
There is also jQuery's getScript to just load a script file. – DerVO Jan 17 '12 at 11:44

1 Answer 1

up vote 1 down vote accepted

If all you are trying to do is update some JS vars, you may be better off having your process.php file returning a json string:

$array = ('percYes' => $yes, 'percNo' => $no);
echo json_encode($array);

This will give you a json string that can be evaluated and used in a callback for your JS ajax call.

So if you have a var 'percYes' and 'percNo' in an accessible scope, your callback could look something like this:

function(jsonstr) {
  obj = eval(jsonstr);
  percYes = obj.percYes;
  percNo  = obj.percNo;
}

I hope this helps.

share|improve this answer
    
This sounds great! So when I want to update the js variables I call function(jsonstr)? – user1104147 Jan 17 '12 at 14:01

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.