分享PHP隐藏文件的真实路径实现下载功能

[php]
/**
?* 下载文件
?* @param string $file
?*?????????????? 被下载文件的路径
?* @param string $name
?*?????????????? 用户看到的文件名
?*/
function download($file,$name=”){
??? $fileName = $name ? $name : pathinfo($file,PATHINFO_FILENAME);
??? $filePath = realpath($file);
???
??? $fp = fopen($filePath,’rb’);
???
??? if(!$filePath || !$fp){
??????? header(‘HTTP/1.1 404 Not Found’);
??????? echo "Error: 404 Not Found.(server file path error)<!– Padding –><!– Padding –><!– Padding –><!– Padding –><!– Padding –><!– Padding –><!– Padding –><!– Padding –><!– Padding –><!– Padding –><!– Padding –><!– Padding –><!– Padding –><!– Padding –>";
??????? exit;
??? }
???
??? $fileName = $fileName .’.’. pathinfo($filePath,PATHINFO_EXTENSION);
??? $encoded_filename = urlencode($fileName);
??? $encoded_filename = str_replace("+", "%20", $encoded_filename);
???
??? header(‘HTTP/1.1 200 OK’);
??? header( "Pragma: public" );
??? header( "Expires: 0" );
??? header("Content-type: application/octet-stream");
??? header("Content-Length: ".filesize($filePath));
??? header("Accept-Ranges: bytes");
??? header("Accept-Length: ".filesize($filePath));
???
??? $ua = $_SERVER["HTTP_USER_AGENT"];
??? if (preg_match("/MSIE/", $ua)) {
??????? header(‘Content-Disposition: attachment; filename="’ . $encoded_filename . ‘"’);
??? } else if (preg_match("/Firefox/", $ua)) {
??????? header(‘Content-Disposition: attachment; filename*="utf8\’\” . $fileName . ‘"’);
??? } else {
??????? header(‘Content-Disposition: attachment; filename="’ . $fileName . ‘"’);
??? }
???
??? // ob_end_clean(); <–有些情况可能需要调用此函数
??? // 输出文件内容
??? fpassthru($fp);
fclose($fp);
exit;
}

[/php]