Pass a Javascript Variable to PHP

[hoopplaya4]

Hi All,

 

I have a bit of code:

 

<a href="javascript:showaddevent(2,5,2);">Click Here</a>

 

When clicked, it opens up a form for users to fill out.  How would I pass those values in the parenthesis to PHP (2,5,2)?

[rubing]

php is on the server.  so you would need to use POST or GET methods of communicating them to the server.  so, you probably want to use ajax

[hoopplaya4]

Good to know.  That's what I was thinking the answer would probably be. 

 

Does anyone have any recommendation on how to do this?  Any specific tutorial or reference? 

 

I don't know much with Ajax. 

[haku]

This book is a great one to start with.

[rubing]

If you know php you may want to check out one of the php/ajax frameworks

[phparray]

I wrote this tutorial awhile back. It's a quick copy paste, get you started type of thing adopted from w3schools.

 

http://forums.hostmysite.com/about9282.html

 

 

 

 

 

[cwarn23]

It is possible to make a link submit a Javascript variable to php at any time but for php to process it in the main page would require a page reload. So basically you setup a link to an invisible iframe and add to the iframe url variables. Then when the iframe loads, it gets the url variables and converts them to session variables. Then those session variables are available to any new page that loads. An example is as follows:

<? //index.php
echo "<a href='iframe.php?myvar=test&var2=example' target='iframe'>test link.</a>";
echo "<iframe width=1 height=1 scrolling='no' name='iframe' frameborder=0 src='iframe.php'></iframe>";
?>

<? //iframe.php
session_start();
foreach ($_GET AS $key => $val)
{
$_SESSION[$key]=$val;
}
unset($key);
unset($val);
?>

In the example above, as soon as the user clicks the link, the following variables will be set:

$_SESSION['myvar']=test

$_SESSION['var2']=example

So it is possible to make variables set at any time but it is just processing or displaying them which is the real trouble.

[RichardRotterdam]

Yes you could use iframes indeed and send the url parameters to that iframe. But why not simply use Ajax it's a lot simpler when you get the hang of it.

The ajax tutorial alpine wrote here a couple of years ago still works

http://www.phpfreaks.com/forums/index.php/topic,115581.0.html