Question

我想知道如何更改我的代码，以便在存在多个页面时为每个页面计算页面视图，并为每个页面显示正确的页面视图。

以下是我的php代码。

//Adds one to the counter
$mysqli = new mysqli("localhost", "root", "", "sitename");
$dbc = mysqli_query($mysqli,"UPDATE counter SET counter = counter + 1");

//Retreives the current count
$count = mysqli_fetch_row(mysqli_query($mysqli,"SELECT counter FROM counter"));

if (!$dbc) 
{
    // There was an error...do something about it here...
    print mysqli_error();
}

这是我的MySQL代码。

CREATE TABLE `counter` ( `counter` INT( 20 ) NOT NULL );
INSERT INTO counter VALUES (0);

这是我之前的替补表。

CREATE TABLE `counter` (
  `id` int(11) NOT NULL auto_increment,
  `ip` varchar(15) NOT NULL default '',
  `page` varchar(100) NOT NULL default '',
  PRIMARY KEY  (`id`),
 KEY `ip` (`ip`,`page`)
)

这是我的旧页面计数器，我正在尝试与我的新页面计数器结合使用。

//Get the viewer's IP Address and the page he / she is viewing
$ip = $_SERVER['REMOTE_ADDR'];
$page = $_SERVER['PHP_SELF'];

//Check that the IP is not already listed for the current page
$viewer_check_query = "SELECT * FROM counter WHERE ip = '$ip' AND page = '$page'";
$viewer_check_result = mysql_query($viewer_check_query);
$viewer_check_numrows = mysql_num_rows($viewer_check_result);
    //If numrows is equal to zero, then the user is new
    if($viewer_check_numrows == 0){
        //Add the new entry
        $viewer_new_query = "INSERT INTO counter (ip, page) VALUES
        ('$ip', '$page')";
        $viewer_new_result = mysql_query($viewer_new_query);
    }

//Get the total number of viewers for this page
$viewer_total_query = "SELECT * FROM counter WHERE page = '$page'";
$viewer_total_result = mysql_query($viewer_total_query);
$viewer_total_numrows = mysql_num_rows($viewer_total_result);

Answer 1

我不建议您“直播”更新数据库。而是使用mod_log_mysql或解析Apache日志文件“离线”。

为什么不呢？您可能想知道，如果有一天您有很多访问者，页面加载会停止，直到数据库更新为止。或者，如果数据库负载过重，更新将停止加载网页。

还有一个提示，使用jQuery或javascript为您的apache日志编写一个特殊的“logevent”，这样您就不会记录所有爬虫等。我正在使用以下代码：

 function logger() {
  var currenturl = location.href;
  $.get("/logthis", { url: currenturl } );
}
$(document).ready(function(){
   logger();
});

Answer 2

您需要添加一个字段“path”，其中包含您网页的路径。

CREATE TABLE `counter` (`counter` INT( 20 ) NOT NULL, 
             `path` VARCHAR(255) IS NOT NULL);

在您的请求中，如果尚未存在，则创建一个新的空计数器。如果它已经存在，你就增加它。

$mysqli = new mysqli("localhost", "root", "", "sitename");

// We get the counter the current URL
$counter = mysqli_query($mysqli, "SELECT counter 
                                  FROM counter 
                                  WHERE `path` = '" . $_SERVER['REQUEST_URI'] . "'";
if ($counter === NULL) 
{
    // If the counter does not exists yet, we create it
    mysqli_query($mysqli, "INSERT INTO counter 
                           VALUES (0, '" . $_SERVER['REQUEST_URI'] . "')";
}

// And we increment the counter
mysqli_query($mysqli, "UPDATE counter 
                       SET counter = counter + 1 
                       WHERE path = '" . $_SERVER['REQUEST_URI'] . "'");

使用PHP和MySQL的页面视图计数器？

2 个答案: