PHP variables that are constantly changing

I recently developed a website that showcases random entries from a database to viewers. Here is the current code snippet I am using:

$records = "SELECT * FROM xxx";
$records_query = mysql_query($records);
$num_records = mysql_num_rows($records_query);
$id= rand(1, $num_records);

This code helps in generating an ID number that corresponds to a database entry, followed by additional PHP to display the content.

To allow users to fetch a different entry from the database, they simply click a button that refreshes the page with this piece of code:

<form>
<input type=button value="Show me another one" onClick="window.location.reload()">
</form>

However, this method has been problematic for Google Adsense as it causes multiple page impressions from individual users. Although I haven't received any feedback from Google regarding this issue, it could seem like an attempt to manipulate the system for advertisers paying based on impressions. This concern might lead Google to block revenue from impression-based ads or potentially revoke my Adsense account.

Therefore, my primary question here is: How can I implement a button that retrieves a new database entry without having to reload the page? Ultimately, I aim to modify the "$id" variable after a user clicks the button.

Answer №1

There are several approaches you can take to achieve your goal.

If you prefer a simple HTML and PHP solution, you could incorporate an IFRAME on your page with a reload button inside. Just be sure not to include the google tracker in the content displayed through the IFRAME. You can easily style the IFRAME to blend in with your existing page using CSS.

However, this method may not be the most efficient way to handle the task at hand.

As recommended by deceze, utilizing Ajax to dynamically fetch new information through Javascript is a more streamlined approach. To simplify this process, consider implementing a Javascript framework to tackle any potential cross-browser compatibility issues.

For example, with jQuery, you can implement the following code snippet in both HTML and javascript:

<!-- New content will appear in the div below -->
<div id="content-target">
</div>

<form>
  <input type="button" id="refresher" />
</form>

<script type="text/javascript">
  $('#refresher').click(function(){
    $('#content-target').load('generator.php');
    return false;
  });
</script>

Investing some time in learning a JS framework like jQuery can greatly benefit your development efforts.

Resources for popular JS frameworks:

jQuery: http://jquery.com/

Prototype:

MooTools:

Dojo: (may be excessive for this type of script)

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