php 下载 打开 文件 图片 图像 有大用 有大大用 有大大大用

1)下载
<?php

/**
 * download page
 *
 * @author  shipingzhong <shipingzhong@altech-it.cn>
 * @version 20090525
 */
 
session_cache_limiter("public"); // for IE

// read user common file
//include this file.... and it has smarty function
require_once("./include/User.inc.php");
   
$uid = $_SESSION['sess_marry_user']['user_id'];
$wid = $_SESSION['sess_marry_user']['wedding_id'];
//download?dl=1&pid={$dataRow.photo_id}"
 
if (empty($uid))
{
    header("location :".HTTP_URL);
}

$pid             = $_GET['pid'];

$userIdInImage   = $Download->getUserIdInImage($pid);

$dataRow         = $Photo->getOne($pid, $userIdInImage);
 
//session_start();              // session_start() in here is error .I don not know
 
$file_name       = $dataRow['photo_real_name']."." .$dataRow['extension'];
 
$uid             = $_SESSION['sess_marry_user']['user_id'];

$file_path       = PHOTO_PATH . $wid . "/" . $file_name;

$showFileName    = $dataRow['photo_base_name'];
$showFileName    = mb_convert_encoding($showFileName, "SJIS", "UTF-8");

Header("Content-type: application/octet-stream");
//Header("Content-type: application/txt");
Header("Accept-Ranges: bytes");
Header("Accept-Length: ".filesize($file_path));
//把 attachment 改成 inline 应该就是打开 好像不行 我暂时也不懂inline什么意思
//Header("Content-Disposition: attachment; filename=" . $showFileName);
Header("Content-Disposition: attachment; filename=\"$showFileName\"");
//殷
 $fp=fopen($file_path, "r");//非文本文件最好用 "rb"

 echo fread($fp, filesize($file_path));
 fclose($fp);
//
//exit;
?>

下载第二个例子 

<?php

if(isset($_GET['url'])){ 

$filename=$_GET['url'];//获取参数 

header('Content-type: image/jpeg'); 

header("Content-Disposition: attachment; filename=eweimanet".date('YmdHis').rand(100,999).".jpg"); 

readfile($filename);

//注意：header函数前确保没有任何输出 

exit;//结束程序 

}

?>

2)打开文件