php -- 文件上传下载

----- 026-upload.php -----

 <!DOCTYPE html>
 <html>
 <head>
     <meta http-equiv="content-type" content="text/html; charset=utf-8">
     <title>上传图片</title>
 </head>
 <body align="left">
 <h2>上传图片</h2>
 <p style="font-size: 16pt">
 <form method="POST"enctype="multipart/form-data" style="border:1px solid; width:400px" >
     上传图片：<input type="file" name='file' id="file"><br/>
     放在这里：<input type="text" name="txt"><br/>
     <input type="submit" name="upload" value="开始上传">
 </form>
 <?php
     foreach ($_POST as $key => $value) {
         echo $key, "=>", $value, "<br/>";
     }
     if(isset($_POST["upload"])){
         echo "就绪了啊！！<br/>";
         echo $_FILES['file']['type'];
         if($_FILES['file']['type'] == "image/pjpeg")
         {
             echo "文件名：", $_FILES['file']['name'], "<br/>";
             echo "文件类型：", $_FILES['file']['type'], "<br/>";
             echo "文件大小：", $_FILES['file']['size'], "<br/>";
             echo "副本名称：", $_FILES['file']['tmp_name'], "<br/>";
             move_uploaded_file($_FILES['file']['tmp_name'], "uploads/".$_FILES['file']['name']);
             echo "文件储存在：",  "uploads/".$_FILES['file']['name'], "<br/>";
             echo "<img src=", "uploads/".$_FILES['file']['name'], " width=300>";

         }
     }
 ?>
 </p>
 </body>
 </html>

----- 027-download.php -----

 <!DOCTYPE html>
 <html>
 <head>
     <meta http-equiv="content-type" content="text/html; charset=utf-8">
     <title>下载文件</title>
 </head>
 <body>
 <fieldset>
 <legend>文件下载</legend>
 <img src="bietaichang.jpg" height="200")/>
 <a href="?action=download">下载文件到本地<br/></a>
 <?php
     $file_name = "bietaichang.jpg";
     $file_dir = "uploads/";
     echo "文件大小：", filesize($file_dir.$file_name), "\n";
     if(isset($_GET["action"]))
     {
         $file = fopen($file_dir.$file_name, "rb");
         header("Content-Type: application/octet-stream");
         header("Accept-Ranges: bytes");
         header("Accept-Length: ".filesize($file_dir.$file_name));
         header("Content-Disposition: attachment; filename=".$file_name);
         echo fread($file, filesize($file_dir.$file_name));
         fclose($file);
         exit;
     }
 ?>
 </fieldset>
 </body>
 </html>