PHP - Download With Speed Limit And Resume

Hi Chaps,

I'm using readfile to force the download of a file:

set_time_limit(0);

$file = 'monkey.gif';

if (file_exists($file)) {
    header('Content-Description: File Transfer');
    header('Content-Type: application/octet-stream');
    header('Content-Disposition: attachment; filename='.basename($file));
    header('Content-Transfer-Encoding: binary');
    header('Expires: 0');
    header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
    header('Pragma: public');
    header('Content-Length: ' . filesize($file));
    ob_clean();
    flush();
    readfile($file);
    exit;
}
flush();


And this works fine, however, I do have some software installation files that could be downloaded (these are in excess of 280Mb).
I have checked php.ini:
Quote

memory_limit = 128M
post_max_size = 300M


But Internet Explorer hangs and then crashes.
Is there a way to allow big files to download using this method, or is there another way of forcing the download, without php 'reading' the file first?
I'm guessing that the problem lies with the memory_limit being smaller than the file size. Is it a good idea to increase the memory_limit to eg. 280Mb?
Cheers

I have searched this forum and the web, but I haven't been able to find a good answer.

I'm interested in the best way (especially some working code snippet, hopefully!) to make a script stop when a limit (either number of rows or time limit or whatever) is reached, call itself and pass some variables to itself via sessions/cookies or $_REQUEST, and then resume where it left off the last time. Does anybody know a way to do this that works reliably in most (all?) environments? Any code that uses header(), output buffering, AJAX, or anything else, that is proven to work?

What I want to do is make a generic script that accepts a (very large) local flat file as a data source, processes the contents and outputs the results either to another local flat file or to another application using the latter's routines. The result isn't necessarily going to be imported into MySQL (so no, LOAD DATA INFILE isn't applicable here).

An example I can think of is processing a CSV file (say, about 100,000 records), converting it on-the-fly and importing the results into WordPress by calling WP's functions to do the actual import. Again, this is just an example. I can write all input, processing and output functions, it's just the best way to restart and resume the script that I'm asking about.

BigDump is another script that does this, but it seems to use AJAX to restart itself. I wouldn't mind using AJAX/jQuery/whatever; in that case, I'd just need some working drop-in code, since my JavaScript/AJAX knowledge isn't very good, to say the least. Nevertheless, I'd rather prefer pure PHP, just in case the user has JavaScript disabled.

Sorry for the long post and thanks in advance!

Unless buffer overflows or breaking out of code to perform a new command are problems that have been solved....

I am trying to figure out the proper PHP method for setting a boundary on a variable within a script. I have this variable $name which is fed a value from $_POST['name'] from a form field. Now this form field is limited in the HTML to accept only 20 characters, but someone could easily edit the form or outgoing post data. So I want to know how to limit the variable size in the script. In other languages it could be something like this: var name(20). So how do I do that in PHP?

Basically I would like to place a link on my website and have the user download a file, but rather than just right clicking and choosing save target as, the link must be clicked, on the next page the file is fetched and then the client can download the file. How would I go about setting this up please?

When the download appears the link that is produced doesn't show the actual download either, so users can't leech of it.

Thanks

I have this php page that based on what the user chooses shows them the appropriate photo galleria and i was wondering if their was any way i could speed this up this is the php code for selecting the galleria and I'm not showing the javascript that does the slide show because it s the galleriffic jquery plugin
Code: [Select]
<div id="Info">
<div id="page">
<div id="container">
            <?php
$g = mysql_real_escape_string($_GET['g']);
$query = "SELECT * FROM pinkpanther_games WHERE Gallery_no = '$g'";
$results = mysql_query($query) or die("Query failed ($_query) - " . mysql_error());
$row = mysql_fetch_assoc($results);
echo "<h1>" . $row['Day_Played'] . " vs " . $row['Opponent'] . "</h1>";
?>
<!-- Start Advanced Gallery Html Containers -->
<div id="gallery" class="content">
<div id="controls" class="controls"></div>
<div class="slideshow-container">
<div id="loading" class="loader"></div>
<div id="slideshow" class="slideshow"></div>
</div>
<div id="caption" class="caption-container"></div>
</div>
<div id="thumbs" class="navigation">
<ul class="thumbs noscript">
<?php
$x = $row['no_Pics'];
$y = 1;
$year = $row['Year_Played'];
$day = $row['Day_Played'];
$scheck = $row['Sessions'];
if ($scheck == 1){
$sessions = "Session1";
}else{
$sessions = "Session2";
}
if ($x == 0){
echo "<li> <a  class='thumb' href='../images/nopics.jpg' title=''><img src='../images/nopicsthumb.jpg ' /></a></li>";
}else if ($x == 10000){
echo "<li> <a  class='thumb' href='../images/coming.jpg' title=''><img src='../images/comingthumb.jpg ' /></a></li>";
}else{
while ($y <= $x){
echo "<li> <a  class='thumb' href='../images/Sections/pinkpanthers/" . $year . "/" . $sessions . "/" . $day . "/" . $y . ".jpg' title=''><img src='../images/Sections/pinkpanthers/" . $year . "/" . $sessions . "/" . $day . "/thumbs/" . $y . ".jpg ' /></a><div class='caption'><div class='download'><a href='../images/Sections/pinkpanthers/" . $year . "/" . $sessions . "/" . $day . "/big/" . $y . ".jpg ' target='_blank' />Download</a></div></div></li>";
$y ++  ;
}
}
?>
</ul>
</div>
<div style="clear: both;"></div>
</div>
</div>
<div id="footer"></div>