Adapting of couponic script: Adding new data export tool

The in the following described project is based on uniprogy's couponic script which is based on Yii framework! If you bid on this project, please tell us directly if you already made experience(s) with couponic and Yii! Rough project description: For reasons of accounting a function should be implemented that summarizes all preselected data (out of the database) of a given period to a CSV-file. When the function is called up, the entitled user has to enter a “From” date, which defines the date where the export should start with and a “To” date, that defines the end date of the export. Additionally the user should get the opportunity to choose which field values should get exported from the database and in which order these data will get exported. If all entered data is correct and valid and fields are selected for export, the export will be triggered after clicking the “Export Data” button. Just as the CSV-file is created the download process should begin. We have a detailed documentation file to this project that we are going to provide you if we reached the next step. Important notice regarding your payment if you get awarded: We made some bad experiences in the past. If we start working with new people, from those we don't have experiences about the way they work, we won't pay money before the project is finished. That's the reason why our projects are often pretty small and clear. Of course we will deposit a milestone for this project at the beginning, but the money will not be released before the task has been finished completely. Please don't bid on this porject if you don't accept this!