Our script to get user data

GetUser.php

<?php
	$db = mysql_connect('localhost', 'username', 'password') or die ('Could not connect: ' . mysql_error());
	mysql_select_db('databasename') or die ('Could not select database');

	$username = mysql_real_escape_string($_GET['username'], $db);

	$query = "SELECT * FROM users WHERE username='$username';";
	$result = mysql_query($query) or die ('Query failed: ' . mysql_error());

	$row = mysql_fetch_assoc($result);

	echo $row['password'];
?>