無法從文件夾中下載文件

Question

可能重複：
mysql_fetch_array() expects parameter 1 to be resource, boolean given in select

CI中我不能從一個文件夾中下載一個PDF文件。當試圖下載它， 在我們的服務器它正在工作，但在客戶端的服務器無法正常工作。可能是什麼原因？

這是我在控制器中的代碼。

$directory = './pdf/'; 
set_realpath($directory); 
$file = $directory.'dwn.pdf'; 
$fp = fopen($file,'wb'); 
$pdfcode = "---some texts----"; 
fwrite($fp,$pdfcode); 
fclose($fp); 
$data = file_get_contents(base_url()."pdf/dwn.pdf"); // Read the file's contents 
$name = 'dwn.pdf'; 
force_download($name, $data); 

這是錯誤。

A PHP Error was encountered 

Severity: Warning 

Message: fopen(./pdf/dwn.pdf) [function.fopen]: failed to open stream: Permission denied 

Filename: controllers/pms.php 

Line Number: 732 
A PHP Error was encountered 

Severity: Warning 

Message: fwrite() expects parameter 1 to be resource, boolean given 

Filename: controllers/pms.php 

Line Number: 733 
A PHP Error was encountered 

Severity: Warning 

Message: fclose() expects parameter 1 to be resource, boolean given 

Filename: controllers/pms.php 

Line Number: 734 

Answer 1

難道是文件名和/或permisisons，試試這個修改後的代碼

$directory = './pdf/'; 
set_realpath($directory); 
$file = $directory.'dwn.pdf'; 
chmod($file,0777); 
$fp = fopen($file,'wb'); 
$pdfcode = "---some texts----"; 
fwrite($fp,$pdfcode); 
fclose($fp); 
$data = file_get_contents($file); // Read the file's contents 
$name = 'dwn.pdf'; 
force_download($name, $data);