Function mcrypt_get_iv_size() is deprecated in codeigniter on PHP version 7.1

Question

When I encrypt my ID using encrypt library that time it gives me an error like :

Thanks for your help

Answer 1

codeigniter already mention it on their official documentation of encrypt Library

This library has been DEPRECATED and is only kept for backwards compatibility. Please use the new Encryption Library.

use new Encryption Library. https://codeigniter.com/userguide3/libraries/encryption.html