How do you connect to multiple MySQL databases on a single webpage?

Question

I have information spread out across a few databases and want to put all the information onto one webpage using PHP. I was wondering how I can connect to multiple databases

Answer 1

if you are using mysqli and have two db_connection file. like first one is

define('HOST','localhost');
define('USER','user');
define('PASS','passs');
define('**DB1**','database_name1');

$connMitra = new mysqli(HOST, USER, PASS, **DB1**);

second one is

    define('HOST','localhost');
    define('USER','user');
    define('PASS','passs');
    define(**'DB2**','database_name1');

    $connMitra = new mysqli(HOST, USER, PASS, **DB2**);

SO just change the name of parameter pass in mysqli like DB1 and DB2. if you pass same parameter in mysqli suppose DB1 in both file then second database will no connect any more. So remember when you use two or more connection pass different parameter name in mysqli function