尝试这样的事情
<?phpdefine('CHUNK_SIZE', 1024*1024); // Size (in bytes) of tiles chunk// Read a file and display its content chunk by chunkfunction readfile_chunked($filename, $retbytes = TRUE) { $buffer = ''; $cnt = 0; $handle = fopen($filename, 'rb'); if ($handle === false) { return false; } while (!feof($handle)) { $buffer = fread($handle, CHUNK_SIZE); echo $buffer; ob_flush(); flush(); if ($retbytes) { $cnt += strlen($buffer); } } $status = fclose($handle); if ($retbytes && $status) { return $cnt; // return num. bytes delivered like readfile() does. } return $status;}// Here goes your pre for checking that the user is logged in// ...// ...if ($logged_in) { $filename = 'path/to/your/file'; $mimetype = 'mime/type'; header('Content-Type: '.$mimetype ); readfile_chunked($filename);} else { echo 'Tabatha says you haven't paid.';}?>
