After transferring the site to another hosting, it gives an error. can you help?

Question

CodeIgniter

I uploaded the site imagine.co.tj to another hosting, I set everything correctly and the database and other parameters. But somehow the error gives "A PHP Error was encountered"
Severity: Notice
Message: Only variable references should be returned by reference
Filename: core/Common.php
Line Number: 257

Answer 1

mysql_* functions are deprecated in version 5.6 (deprecated). Calling them produces a Notice.
In older versions, these functions are not available at all.
In your case, a Fatal Error is issued and it says that the function does not exist, which means that your interpreter version is 7 or higher. Change to 5.6 and turn off Notice output and it will work without errors.