求php实现代码 实现点击url 就记要一个指定的参数

<br />CREATE TABLE `unsubscribe` (<br />  `id` int(10) unsigned NOT NULL auto_increment,<br />  `username` varchar(100) NOT NULL,<br />  PRIMARY KEY  (`id`)<br />) ENGINE=MyISAM  DEFAULT CHARSET=latin1 AUTO_INCREMENT=1 ;<br />

<br />// 连接数据库  <br />[email&#160;protected]_connect("localhost","root","123456")  or die(mysql_error());   // localhost是添你db的host，如果不是本地的请修改这里<br />@mysql_select_db('mydatabase',$conn) or die(mysql_error()); <br /><br />$username = isset($_GET['username'])? mysql_escape_string($_GET['username']) : '';<br /><br />if($username){<br />	$sqlstr = "insert into unsubscribe(username) values('".$username."')";<br />    mysql_query($sqlstr) or die(mysql_error());<br />    echo 'insert success';<br />}<br />

<br />$username=$_GET['username'];<br />$con=mysqli_connect('localhost','root','123456','mydatabase');<br />$sql="insert into unsubscribe(username) values('$username')";<br />if(mysqli_query($con,$sql)){<br />    echo '插入信息成功';<br />}else{<br />    echo '插入信息失败';<br />}<br />