MYSql Website won't connect

[Dan Ocenas]

I am trying to help a fiend with migrating a website from one host to a new host. I have uploaded and moved everything in place but the DB won't connect. The original code is

<?php
function db_connect()
{
//connnect to database
$dbcnx = mysqli_connect("127.0.0.1", "", '', '')
or die ("Could not connect to db. Error: ". mysqli_errno($GLOBALS['db']) . mysqli_error($GLOBALS['db']));
$GLOBALS['db'] = $dbcnx;
return $dbcnx;
}

I can establish a connection to the DB with the following but the queries won't work.

<?php
function db_connect()
{
//connnect to database
$dbcnx= new mysqli("l", "", '', '')
or die ("Could not connect to db. Error: ". mysqli_errno($GLOBALS['db']) . mysqli_error($GLOBALS['db']));
$GLOBALS['db'] = $dbcnx;
return $dbcnx;
}


Thoughts please help it has been a long time since I have done MySQL so I am a bit rusty.