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I have a website which fetches data from some PHP files to display it on the website. However, to protect my data to be used by other people, I wish to protect my PHP file being called by crawlers, bot etc to gather data.
I have prevented it by checking referral URL , but that can be easily by-passed. So, is there any other way to protect my data . I wish that only my website can call to those files.
Thanks !!
As suggested by DaveRandom, I finally used a cookie based authentication technique to avoid calling of PHP by other websites.
The server first sets a access code for each valid client. This access code is checked at the beginning of my PHP file.
Cookie is set a max time limit of 5 hrs and cookie is destroyed on window close. This is working pretty fine for me.
Please mention if there is any glitches in this part !!