This plugin will help manage query string variables to ensure that desired variables are always included on certain domains. This plugin was developed
This tool will scan links with the specified domains for the query string variables listed below and ensure that they are updated with the appropriate values. These valued can be defined by:
The list above indicates the order of override - in short, settings for a post/page will cause mismatching values set via url to be ignored. Note: This processing will only apply to material output via the_content() (this includes pages & posts).
For example - if the domain is http://www.wordpress.org and the query string variables defined are "affiliateID" and "trafficSource", any links to http://www.wordpress.org would have the affiliateID & trafficSource query string variables appended. If they are already in the link's url, it will update those variables to the correct values.