用PHP和MYSQL建立计数器过程详解
2018-09-07 14:27
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：
<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>
文章标题：用PHP和MYSQL建立计数器过程详解
文章链接：http://soscw.com/index.php/essay/13537.html