php判斷是否有許可權下載

<?php<br />if($_GET['id']==2)<br />{<br />//$file_name = "info_check.exe";<br />//$file_dir = "/public/www/download/";<br />$dir='maze.png';<br />if (!file_exists($dir)) { //檢查檔案是否存在<br />echo "檔案找不到";<br />exit;<br />} else {<br />$file = fopen($dir,"r"); // 開啟檔案<br />//$file=file_get_contents($dir);<br />// 輸入檔案標籤<br />Header("Content-type: application/octet-stream");<br />Header("Accept-Ranges: bytes");<br />Header("Accept-Length: ".filesize($dir));<br />Header("Content-Disposition: attachment; filename=" . $dir);<br />// 輸出檔案內容<br />//echo $file;<br />echo fread($file,filesize($dir));<br />fclose($file);<br />exit;<br />}<br />}<br />else<br />{<br />echo "<mce:script type="text/javascript"><!--<br />history.go(-1);<br />// --></mce:script>";<br />}<br />?><br /> 

<a href="csdn23.php?id=1" mce_href="csdn23.php?id=1">可圈套</a>