php通过加http响应头强制用户下载

2015/01/09 43222

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php中可以通过设置header的content-type，强制用户下载内容，而非直接在浏览器中打开，如下代码实现：

downloadFile.php

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<?php
$filename = $_GET['file']; //Get the fileid from the URL
// Query the file ID
$query = sprintf("SELECT * FROM tableName WHERE id = '%s'",mysql_real_escape_string($filename));
$sql = mysql_query($query);
if(mysql_num_rows($sql) > 0){
    $row = mysql_fetch_array($sql);
    // Set some headers
    header("Pragma: public");
    header("Expires: 0");
    header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
    header("Content-Type: application/force-download");
    header("Content-Type: application/octet-stream");
    header("Content-Type: application/download");
    header("Content-Disposition: attachment; filename=".basename($row['FileName']).";");
    header("Content-Transfer-Encoding: binary");
    header("Content-Length: ".filesize($row['FileName']));
 
    @readfile($row['FileName']);
    exit(0);
}else{
    header("Location: /");
    exit;
}
?>

files.php

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<a href="downloadFile.php?file=7383">Download</a>