Two odbc_connect calls using the same credentials
<?php
    $user     = "root";
    $password = "root";
    $server   = "localhost";
    $db       = "dbo";

    $dsn      = "SERVER=$server; DRIVER=SQL Server; DATABASE=$db";

    $connection_1 = odbc_connect($dsn, $user, $password);
    //Do some stuff
    $connection_2 = odbc_connect($dsn, $user, $password);
    //Do some stuff
?>