PHP readfile() and large downloads
- by Nirmal
While setting up an online file management system, and now I have hit a block.
I am trying to push the file to the client using this modified version of readfile:
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;
}
But when I try to download a 13 MB file, it's just breaking at 4 MB.
What would be the issue here? It's definitely not the time limit of any kind because I am working on a local network and speed is not an issue.
The memory limit in PHP is set to 300 MB.
Thank you for any help.
