PHP显示当前在线人数

我们可以通过程序来显示当前的数据。

　　注意：必须把下列代码放到扩展名为.PHP的文件中；在你的服务器上运行代码时，你的服务器必须支持MYSQL数据库。

　　代码如下：

　　下列代码放到你想显示信息的地方。

<?php

//EDIT THIS

＄server = "localhost";

＄db_user = "database username";

＄db_pass = "database password";

＄database = "database";

＄timeoutseconds = 300;

//STOP EDITING

＄timestamp = time();

＄timeout = ＄timestamp-＄timeoutseconds;

mysql_connect(＄server, ＄db_user, ＄db_pass);

＄insert = mysql_db_query(＄database, "INSERT INTO useronline VALUES

('＄timestamp','＄REMOTE_ADDR','＄PHP_SELF')");

if(!(＄insert)) {

print "Useronline Insert Failed > ";

}

＄delete = mysql_db_query(＄database, "DELETE FROM useronline WHERE timestamp<＄timeout");

if(!(＄delete)) {

print "Useronline Delete Failed > ";

}

＄result = mysql_db_query(＄database, "SELECT DISTINCT ip FROM useronline WHERE file='＄PHP_SELF'");

if(!(＄result)) {

print "Useronline Select Error > ";

}

＄user = mysql_num_rows(＄result);

mysql_close();

if(＄user == 1) {

print("＄user\n");

} else {

print("＄user\n");

}

?>

　　最后在MYSQL中修改你的 username 和 passwords 。