How to pass query string as encoded value to another parameter?

[Srinivas Reddy <bhsrinivasareddy@xxxxxxxxx>]

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In my use case, I need to encode {QUERY_STRING} value and pass this value as a separate parameter. Here it is how it should work: http://www.example.com?param1=value1&param2=value2&param3=value3 The URL can have n number of parameters and values may contain special characters and value is an alphanumeric string. I need to transform the URL to: http://www.example.com?param1=value1&param2=value2&param3=value3&originalQP=param1=value1%26param2=value2%26param3=value3 I added parameter called originalQP and it should be always encoded. How can I get this encoded string using mod rewrite flags? I tried using B and NE flags but neither of them worked. I am not getting '&' being encoded in the transformed URL instead originalQP value is being passed as param1=value1. How can I get complete value?