基于数据库的页面计数器范例-PHP源码

$db=mysql_connect("localhost","root","qwaszx");

$query="select * from num";

$result=mysql_db_query("test",$query);

if($result){

$r=mysql_fetch_array($result);
$counter=$r["NumValue"];
$counter=$counter+1;

$query='update num set NumValue='.$counter.' where id=1';

$result=mysql_db_query("test",$query);

mysql_close();
echo '您好，您是第'. $counter.'位访客';
}

?>