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Editorial Team
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Asked: 2026-05-26T21:22:19+00:00

I’ve a php code for a file download for specific user I’m storing the

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I’ve a php code for a file download for specific user
I’m storing the content of the file in a database (using blob type). 

<?php
//do stuffs to validate user
//do stuffs get the content from database;
//$r=mysql_fetch_object("$query");
header("Content-Type: $r->type");
header("Content-Disposition: attachment; filename=\"$r->name\"");
echo $r->content;
?>

In case of large files the file downloading takes long time.
How to improve the code?
Does the speed of download increased with multiple connections?

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1 Answer

  1. Editorial Team

    Assuming there’s no artificial limits placed on the connection, an HTTP transfer will take up as much of the network pipe as it can.

    Once the connection starts getting throttled (e.g. on a file download site like Rapidshare, ‘free’ users get limited bandwidth), then using parallel connections MAY increase speed. e.g. a single stream is limited to 50k/s, so opening 2 streams would make for an effective 100k/s.

    But then you’re going to have to support ranged download. Your script as it stands sends out the entire file, from beginning to end. So the user would download the whole file twice.

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