SERP Checking script for Codeigniter integration

Estimated duration: 5
Description: We need a Google SERP checking script made for integration with codeigniter (which follows a Model-View-Controller methodology).

The script must accept the following variable parameters:

* Google version (eg .co.uk, .com, .fr)
* website url to be searched for (e.g http://www.webwisemedia.co.uk)
* keyword to be checked (e.g "Web Design Exeter")

The script must:

* return the position of the website on Google, as an integer
* search the top 50 positions on google only, if website doesn't appear in the top 50, return FALSE or similar

All code must be commented, and easy to read.

Your work will be checked by our in-house PHP team. We suggest using curl for this script.

UPDATE:

We have had many proposals for this project. To help us choose the right person/company, please send your response with details of:
* outline your plan for the script, to show us that you understand the task
* tell us about your previous experience with the codeigniter framework, specific examples are desired
* give us a quote for the total cost of the project. If you can not provide a quote, please provide an estimate
* please provide a timescale
All other proposals that do not include this information will be rejected. Thank you.