当前位置:Gxlcms > PHP教程 > 用PHP和MYSQL建立计数器过程详解_PHP教程

用PHP和MYSQL建立计数器过程详解_PHP教程

时间:2021-07-01 10:21:17 帮助过:27人阅读

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:



$myvar = "来访人数:";
echo $myvar;
?>

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();
}
?>

www.bkjia.comtruehttp://www.bkjia.com/PHPjc/313818.htmlTechArticle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...

人气教程排行