Sheldon Glickler wrote:
I have a set of jpg files on a page. I want to give the user the option to
downloadd all of them at once. What is the code to do that? It must exist
because many times users are presented with a download button and there must
be something behind it. Even if it is one file at a time, I can loop
through the list. As for a name, I can use the current name and if it is
one at a time, then the user can name each one.
Alternatively, I could zip it up into one file and then have the download.
So, I have two questions:
1 - What is the code to download a file to the user's computer?
This works for me. For a SINGLE file. In essence I call this from a URL
pointing to it with the file name as GET variable. This is via a
stament iek
<A HREF="filesend.php?filename="myfile.jpg">Myfile.jp g</a>
You will have to fudge your own ways to arrive at eh name, size and
filetype: the $content is the contents of the file: In my case from a
database. In yours you can just output the file:-
Filesend.php...fragment..
=========================
$name=$_GET['filename'];
// insert code to see if file exists, determine its size,
$mtype=get_mime($name); //get_mime() in my case parses /etc/mimetypes
and attempts a match from that to extension.
//spit out standard header stuff
header("Pragma: public");
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Cache-Control: public");
header("Content-Description: File Transfer");
header("Content-Type: ".$mtype);
header("Content-Disposition: attachment; filename=\"".$name."\"");
header("Content-Transfer-Encoding: binary");
print $content;
function get_mime($filename)
{
$default="application/force-download";
// first extract the extension
$array=explode(".",$filename); // split the name into the bits
separated by periods
$count=count($array);
if ($count<2) // if there IS NO extension..
return $default; // and let the user sort it out.
$ext=$array[$count-1]; // it will be the last element in the array..
$fp=fopen("/etc/mime.types", "r");
if(!$fp) return ($default); // no /etc/mime.types file
while (!feof($fp))
{
$buffer = fgets($fp, 128);
if (ctype_space($buffer{0}) || $buffer{0}=='#' || $buffer{0}=='\n')
continue; // skip empty lines. or lines starting with spaces
or hashes
sscanf($buffer, "%s %s %s %s %s %s \n",$mime_type,$extension,
$extension1, $extension2, $extension3, $extension4);
if ($ext==$extension || $ext==$extension1 || $ext==$extension2 ||
$ext==$extension3 || $ext==$extension4 )
{
fclose ($fp);
return($mime_type);
}
}
fclose($fp);
return $default;
}
2 - How do I zip up a set of jpg files on the server?
Oh..if you want to send a stream of all the checked fils in a ZIP?
I am sure there is a standard option in PHP for that.
>
Shelly
