PHP：如何使用ReadFile的與輸出緩衝壓縮

Question

我有下面的代碼（從http://www.php.net/manual/en/function.readfile.php）正常投放文件下載：

header('Content-Description: File Transfer'); 
header('Content-Type: application/octet-stream'); 
header('Content-Disposition: attachment; filename='.basename($file)); 
header('Expires: 0'); 
header('Cache-Control: must-revalidate'); 
header('Pragma: public'); 
header('Content-Length: ' . filesize($file)); 
ob_clean(); 
flush(); 
readfile($file); 
exit; 

但如果我有ob_start('ob_gzhandler');之前header()聲明它沒有工作。

Answer 1

使用此代碼（你不需要修改ob_start('ob_gzhandler');，如果你之前的話）：

error_reporting(0); //Errors may corrupt download 
ob_start(); //Insert this 
header('Content-Description: File Transfer'); 
header('Content-Type: application/octet-stream'); 
header('Content-Disposition: attachment; filename='.basename($file)); 
header('Expires: 0'); 
header('Cache-Control: must-revalidate'); 
header('Pragma: public'); 
//header('Content-Length: ' . filesize($file)); //Content now is compressed, you need to disable this 
//Note: Download also works if you do not comment out Content-Lenght (tested in IE8) 
ob_clean(); 
ob_end_flush(); //Modify flush() to ob_end_flush(); 
readfile($file); 
exit;