How to pass variable from JavaScript to PHP using jQuery POST

Question

I am passing the variable sessionnum from the following Javascript function in the page chat.php:

$(document).ready(function(){

        timestamp =         


        

Answer 1

It would appear as though you're relying on register_globals, and referencing what would be the POST variable in PHP, instead of referencing the $_POST superglobal index, e.g.

if ( $_POST['action'] == 'postmsg' ) {
    $name= mysql_real_escape_string( trim( $_POST['name'] ) );
    // query using $name reference
}

As an aside, you should really reconsider allowing the use of the tablename in the client side code.