zip存檔和下載無法正常工作

Question

我需要在index.php中創建zip文件。我的代碼是：

$zip = new ZipArchive(); 

$DelFilePath="first.zip"; 

if(file_exists($_SERVER['DOCUMENT_ROOT']."/admin/Allorders/".$DelFilePath)) { 

     unlink ($_SERVER['DOCUMENT_ROOT']."/admin/Allorders/".$DelFilePath); 

} 
if ($zip->open($_SERVER['DOCUMENT_ROOT']."/admin/Allorders/".$DelFilePath, ZIPARCHIVE::CREATE) != TRUE) { 
     die ("Could not open archive"); 
} 
    $zip->addFile($_SERVER['DOCUMENT_ROOT']."/admin/index.php","file.php"); 

// close and save archive 


$file=$_SERVER['DOCUMENT_ROOT']."/admin/Allorders/".$DelFilePath; 

header('Content-Description: File Transfer'); 
header('Content-Type: application/octet-stream'); 
header('Content-Disposition: attachment; filename="'.basename($file).'"'); 
header('Content-Transfer-Encoding: binary'); 
header('Connection: Keep-Alive'); 
header('Expires: 0'); 
header('Cache-Control: must-revalidate, post-check=0, pre-check=0'); 
header('Pragma: public'); 
header('Content-Length: ' . filesize($file)); 

我得到一個0字節的zip文件。我的代碼中有什麼問題？

Answer 1

聲明所有標題後，您需要將實際數據回顯出來。所以：

header('Content-Description: File Transfer'); 
header('Content-Type: application/octet-stream'); 
header('Content-Disposition: attachment; filename="'.basename($file).'"'); 
header('Content-Transfer-Encoding: binary'); 
header('Connection: Keep-Alive'); 
header('Expires: 0'); 
header('Cache-Control: must-revalidate, post-check=0, pre-check=0'); 
header('Pragma: public'); 
header('Content-Length: ' . filesize($file)); 
echo $data; 

其中$ data是zip壓縮文件的內容。

也試試zip上的一些var_dump（）來查看它在內存中是否正常。