PHP用代码实现文件上载

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Release: 2016-06-13 10:38:41
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PHP用代码实现文件下载

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<? if( empty($_GET['FileName'])|| empty($_GET['FileDir'])|| empty($_GET['FileId'])){     echo'<script> alert("非法连接 !"); location.replace ("index.php") </script>'; exit(); } $file_name=$_GET['FileName']; $file_dir=$_GET['FileDir']; $FileId=$_GET['FileId']; $file_dir = $file_dir."/"; if   (!file_exists($file_dir.$file_name))   {   //检查文件是否存在     echo   "文件找不到";     exit;       }   else   {   $file = fopen($file_dir . $file_name,"r"); // 打开文件 // 输入文件标签 Header("Content-type: application/octet-stream"); Header("Accept-Ranges: bytes"); Header("Accept-Length: ".filesize($file_dir . $file_name)); Header("Content-Disposition: attachment; filename=" . $file_name); // 输出文件内容 echo fread($file,filesize($file_dir . $file_name)); fclose($file); exit(); } ?>
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网友回复:

if (!file_exists($file_dir.$file_name)) { //检查文件是否存在?
这个是错误的,检查文件是否存在要用is_file,file_exists在文件不存在但是文件夹存在的时候也会返回TRUE。

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From:http://www.cnblogs.com/analyzer/articles/1393967.html

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