Access denied for user 'www-data'@'localhost' (using password: NO)

[rupalee]

$hostname='localhost';
$dbuser='root';
$dbpass='mysql_root';
$dbname='GlobalDx';

$db = mysql_connect("$hostname","$dbuser","$dbpass","$dbname") or die("Error connecting to db");
	  mysql_select_db("$dbname",$db) or die(mysql_error());
echo $db;

[Mayur2007]

Please refer the mysql_connect functions syntax and then try it.

see the below for information.

$link = mysql_connect($server, $username, $password) or die('Unable to connect');

if ($link) mysql_select_db($database);