我有一个200MB的文件,想通过下载提供给用户。但是,由于我们希望用户仅下载一次此文件,因此我们这样做:
echo file_get_contents('http://some.secret.location.com/secretfolder/the_file.tar.gz');
强制下载。但是,这意味着整个文件必须加载到内存中,这通常不起作用。我们如何以每块kb的速度将文件流式传输给他们?
尝试这样的事情
<?php define('CHUNK_SIZE', 1024*1024); // Size (in bytes) of tiles chunk // Read a file and display its content chunk by chunk function 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 $status; } // Here goes your code for checking that the user is logged in // ... // ... if ($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.'; } ?>