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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