PHP+Mysql統計文件下載次數實例

PHP+Mysql統計文件下載次數實例，實現的原理也很簡單，是通過前臺點擊鏈接download.php傳參id，來更新點擊次數。

獲取文件列表：

<?php 
require 'conn.php'; 

$query = mysql_query("SELECT * FROM downloads"); 
$lists = array(); 
while ($row = mysql_fetch_assoc($query)) { 
    $lists[] = $row; 
} 
?>

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讀取文件列表，並加上download.php鏈接和參數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="下載次數"><?php echo $v['downloads'] ?></span><span class="download">點擊下載</span></a></li> 
                <?php } ?> 
</ul>

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點擊下載按鈕，累加文件次數：

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

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download.php文件源碼：

<?php 
$id = (int) $_GET['id']; 

if (!isset($id) || $id == 0) 
    die('參數錯誤!'); 
$query = mysql_query("select * from downloads where id='$id'"); 
$row = mysql_fetch_array($query); 
if (!$row) 
    exit; 
$filename = iconv('UTF-8', 'GBK', $row['filename']); //中文名稱注意轉換編碼 
$savename =  $row['savename']; //實際在服務器上的保存名稱 
$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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