Hi, zoho creator/portal already provide auth token to access application used to import/export data. I can do this job easily for you using PHP scripting language.
With about 7 years experience in web development and 3+ years experience in Zoho applications, you can be assured of a quality result from my side, please let me know if you have any query for me, and I would be glad to answer.
Looking forward to working with you on your job.
Thank you.