small php script editing excel csv file under centos - repost 2

i have csv file downloaded from vendor every day in my centos server file path is /home/casemost/public_html/csv/[login to view URL] see attached file named [login to view URL] there are total 11 key columns such as (SKU, Catergory,Subcategory,LargeImage,Title,QtyAvailable,Description,netWeight,[login to view URL],UPC) you can safely ignore 'mapprice' column Your job is creating php script to edit this csv file , then i will run this script every day using server cron! script do following work 1. read attached file named csv and rename it as '[login to view URL]', be noted these two file names are constant,mean should be there under file path always! this '[login to view URL]' should be edited 2. if any key columns value is missing, then delete that row 3. merge column C & D value into C columm example, C2 value =Audio & Bluetooth, D2 value=Audio Adaptors, then make value "Audio & Bluetooth/Audio Adaptors" 3. if 'Make' Column cell value is empty, put 'casemost' 4. after making above job, copy it named as 'date'.csv for backup and compare purpose. after 7 days there should be [login to view URL], [login to view URL],[login to view URL],[login to view URL],[login to view URL],[login to view URL],[login to view URL] 5. do compare '[login to view URL]' and 'last [login to view URL]' find any 'SKU' gone! then make '[login to view URL]' containing only gone SKU rows from 'last [login to view URL]' example, today is July 10 Wed. compare '[login to view URL]' with [login to view URL] dated July.9 and find any sku not exist in '[login to view URL]' make '[login to view URL]' only containing missing sku row data. 6. do copy this '[login to view URL]' named as '[login to view URL]' for backup purpose , in csv folder [login to view URL], delete.Tue.csv............ 7. lastly delete backup files of 7 day old. example if today is Monday, delete '[login to view URL]' and '[login to view URL]' attached file encoding is UTF-8 encoded, and all file should be too from my small research, this work can be achieved using php script without much trouble. all csv file should have same header of '[login to view URL]' do test before deliver this script to me. 50 % initial milestone and 50% at the time of delivery. first half will be released delivery date,second half follow 7 days be sure to download attached file before bidding. i don't like canned bid like ' i can do it' without reading full post and seeing file richard*dot*park745