How to update a mysql database without reloading page

Question

thanks for looking. I have a very long list of items, users click on an image (a plus sign) to add the item to their personal list. At the moment when they click the + it l

Answer 1

You would achieve this via JavaScript utilizing something referred to as "AJAX". An Asynchronous JavaScript And XML request allows JavaScript to send a request to another page and get the results from it.

So utilizing ajax, you would go to the URL you wanted, and then you could display the message to a user.

I use a library called jQuery to get something like this done

$.ajax({
    'url': 'path/to/add-item.php', 
    'type': 'GET',
    'dataType': 'json', 
    'data': {itemid: xx}, 
    'success': function(data) {
      // what happens if the request was completed properly
    },
    'error': function(data) {
      // what happens if the request fails.
    }
  });

Note that just because a request completes properly, doesn't mean the item was added as necessary.

I would suggest you read up on the following to get a good understanding of how exactly to adapt this to your needs.

http://json.org/

http://api.jquery.com/jQuery.ajax/

http://ca3.php.net/json_encode