PHP+Mysql统计文件下载次数实例

PHP+Mysql统计文件下载次数实例，实现的原理也很简单，是通过前台点击链接download.php传参id，来更新点击次数。

获取文件列表：

<?php 
require 'conn.php'; 
 
$query = mysql_query("SELECT * FROM downloads"); 
$lists = array(); 
while ($row = mysql_fetch_assoc($query)) { 
    $lists[] = $row; 
} 
?>

读取文件列表，并加上download.php链接和参数id：

<ul class="filelist"> 
    <?php foreach ($lists as $v) { ?> 
        <li><a href="download.php?id=<?php echo $v['id'] ?>"><?php echo $v['filename'] ?><span class="downcount" title="下载次数"><?php echo $v['downloads'] ?></span><span class="download">点击下载</span></a></li> 
                <?php } ?> 
</ul>

点击下载按钮，累加文件次数：

$(function() { 
        $('ul.filelist a').live('click', function() { 
            var count = $('.downcount', this); 
            count.text(parseInt(count.text()) + 1); 
        }); 
});

download.php文件源码：

<?php 
$id = (int) $_GET['id']; 
 
if (!isset($id) || $id == 0) 
    die('参数错误!'); 
$query = mysql_query("select * from downloads where id='$id'"); 
$row = mysql_fetch_array($query); 
if (!$row) 
    exit; 
$filename = iconv('UTF-8', 'GBK', $row['filename']); //中文名称注意转换编码 
$savename =  $row['savename']; //实际在服务器上的保存名称 
$myfile = 'files/' . $savename; //文件 
 
if (file_exists($myfile)) { 
    mysql_query("update downloads set downloads=downloads+1 where id='$id'"); 
    $file = @ fopen($myfile, "r"); 
    header("Content-type: application/octet-stream"); 
    header("Content-Disposition: attachment; filename=" . $filename); 
    while (!feof($file)) { 
        echo fread($file, 50000); 
    } 
    fclose($file); 
    exit; 
} else { 
    echo '文件不存在！'; 
} 
?>

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