title: how to do mysql to mysqli
body: <p>Not to a specific query but all of software queries to be converted from mysql to mysqli due to the advent of PHP 7. It is a very old coding and so there are many occurrences as such. Piece of string or syntax is    mysql_query($query, $link);to be converted to mysqli_query($link, $query); $link1, $link2 can be for different database connections.</p>