Everett
Level X4
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This is not old news, however this deserves a post on the community discussions. Many PHP scripts are going to fail to work if you have PHP 7.0 installed on your server. You'll need to use either MySQLi or PDO for your database connections.
If you're not familiar with PDO, converting your MySQL functions to MySQLi is easier than converting to PDO. Some functions would need to be rewritten as not only did PHP discontinue MySQL, they also deprecated other functions as well. Also, you could also check the marketplace for programmers whom can convert MySQL to MySQLi at an affordable cost.
Have you converted to PDO, or MySQLi?