Selecting anouther DB

<?php
$connect = MYSQL_CONNECT('arguments');
$selection = mysql_select_db('db name', $connect);
if(!$void)
{
  echo "Died";
}
else
{
  $stmt = mysql_query("SELECT * FROM tablename", $selection);
  $ikd = mysql_fetch_row($stmt);
  var_dump($ikd);
}
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$conecting = $modx->db->connect($host='localhost', $dbase = 'basename', $uid = 'username', $pwd = 'password');
$modx->db->exec(mysql_select_db('dbname', $connecting));
$modx->db->select($from='tablename');

//try to connect to and select the database 
mysql_connect(DATABASEHOST,DATABASEUSERNAME,DATABASEPASSWORD) OR DIE ('Unable to connect to database! Please try again later.');
mysql_select_db(DATABASENAME) or die( "Unable to select database");
$query = 'YOUR SQL QUERY GOES HERE';
$rs = mysql_query($query);
mysql_close();

if ($rs)
{
	while( $row = mysql_fetch_assoc($rs) )
	{
		//YOUR MANIPULATION OF THE DATA GOES HERE
	}
}

$stmt = mysql_query("SELECT * FROM tablename", $connect);

$stmt = mysql_query("SELECT * FROM tablename", $selection);