用PHP和MYSQL建立计数器过程详解

时间：2007-02-18 来源：PHP爱好者

运行MYSQL.EXE
mysql> create database counter;
Query OK, 1 row affected (0.10 sec)

mysql> use counter;
Database changed

mysql> create table tl(id integer(2),count integer(5));
Query OK, 0 rows affected (0.21 sec)

mysql> show columns from tl;
+-------+--------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+--------+------+-----+---------+-------+
| id | int(2) | YES  |    | NULL |    |
| count | int(5) | YES  |    | NULL |    |
+-------+--------+------+-----+---------+-------+
2 rows in set (0.05 sec)

mysql> select * from tl;
Empty set (0.08 sec)

mysql> insert into tl(id,count) values(1,1);
Query OK, 1 row affected (0.02 sec)

mysql> select * from tl;
+------+-------+
| id | count |
+------+-------+
| 1 |    1 |
+------+-------+
1 row in set (0.03 sec)

下面编写HTML文件内容：

CODE:

[复制到剪切板]

<html>
<body>

<?php
$myvar = "来访人数：";
echo $myvar;
?>

<?php
mysql_connect() or die("there are problems to connect to mysql!");
$query="select * from tl";
$result=mysql_db_query("counter",$query);
if($result){
  $r=mysql_fetch_array($result);
  $counter=$r["count"];
  $counter=$counter+1;
  echo $counter;
  $query="update tl set count='$counter' where id=1";
  $result=mysql_db_query("counter",$query);
  mysql_close();
}
?>
</body>
</html> 非常全面的一个php技术网站,php爱好者站 http://www.phpfans.net 有相当丰富的文章和源代码.

相关阅读更多 +