Voting

The Note You're Voting On

19 years ago
In response to flowbee@gmail.com --



When using the readfile_chunked function noted here with files larger than 10MB or so I am still having memory errors. It's because the writers have left out the all important flush() after each read. So this is the proper chunked readfile (which isn't really readfile at all, and should probably be crossposted to passthru(), fopen(), and popen() just so browsers can find this information):



<?php

function readfile_chunked($filename,$retbytes=true) {

   $chunksize = 1*(1024*1024); // how many bytes per chunk

   $buffer = '';

   $cnt =0;

   // $handle = fopen($filename, 'rb');

   $handle = fopen($filename, 'rb');

   if ($handle === false) {

       return false;

   }

   while (!feof($handle)) {

       $buffer = fread($handle, $chunksize);

       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;



}

?>



All I've added is a flush(); after the echo line. Be sure to include this!
<< Back to user notes page