Dynamically insert sub id into iframe code - php

Question

How would i take a sub id from a destination url and have it dynamically inserted into an iframe code before the page or iframe is loaded?
I want to add the subid to be able to track conversions from adsense without having a thankyou/goal page since the iframe stays on the same page.
this is the code i have at the end of my destination url
&subid=campaignname_{keyword}
this is the iframe code where i want the subid to dynamically insert before loading
<iframe border="0" frameborder="0" width="680" height="800" src="http://xxxxxxx.com?PublisherSubID=</iframe>

Answer 1

If I understand correctly, you have a page http://xxxxxx.com?subid=12345 and you want to take the subid and drop it into the url of your iframe source.
Try this:
<iframe border="0" frameborder="0" width="680" height="800" src="<iframe border="0" frameborder="0" width="680" height="800" src="http://xxxxxxx.com?PublisherSubID=<?php echo $_GET['subid']; ?>"></iframe>
This will take the subid from the $_GET array of your page and drop it into the source url of your iframe.
This will also include the "campaignname_" text as well. if you want to strip that out, then instead of $_GET['subid'] use str_replace("campaignname_","",$_GET['subid']);