<?php 
$databaseConnection = null;
function getConnection(){
	$hostname = "localhost"; //数据库服务器主机名,可以用IP代替
	$database = "users"; //数据库名
	$userName = "root"; //数据库服务器用户名
	$password = ""; //数据库服务器密码
	global $databaseConnection;
	$databaseConnection = @mysql_connect($hostname, $userName, $password) or die(mysql_error()); //连接数据库服务器
	mysql_query("set names 'gbk'");//设置字符集
	@mysql_select_db($database, $databaseConnection) or die(mysql_error());

}
function closeConnection(){
	global $databaseConnection;
	if($databaseConnection){
		mysql_close($databaseConnection) or die(mysql_error());
	}
}
?>