wget return downloaded filename - php

Question

I'm using wget in a php script and need to get the name of the file downloaded.
For example, if I try
<?php
system('/usr/bin/wget -q --directory-prefix="./downloads/" http://www.google.com/');
?>
I will get a file called index.html in the downloads directory.
EDIT: The page will not always be google though, the target may be an image or stylesheet, so I need to find out the name of the file that was downloaded.
I'd like to have something like this:
<?php
//Does not work:
$filename = system('/usr/bin/wget -q --directory-prefix="./downloads/" http://www.google.com/');
//$filename should contain "index.html"
?>

Answer 1

Maybe that's some kind of cheating, but why not :
decide yourself the name of the file that wget should create
indicate to wget that the download should be made to that file
when the download is finished, use that file -- as you already know the name.
Check out the -O option of wget ;-)
For example, running this from the command-line :
wget 'http://www.google.com/' -O my-output-file.html
Will create a file called my-output-file.html.

Answer 2

if your requirement is simple like just getting google.com, then do it within PHP
$data=file_get_contents('http://www.google.com/');
file_put_contents($data,"./downloads/output.html");

Answer 3

On Linux like systems you can do:
system('/usr/bin/wget -q --directory-prefix="./downloads/" http://www.google.com/');
$filename = system('ls -tr ./downloads'); // $filename is now index.html
This works if there is no other process creating file in the ./downloads directory.

Answer 4

I ended up using php to find the most recently updated file in the directory using the following code:
<?php
system('/usr/bin/wget -q --directory-prefix="./downloads/" http://www.google.com/');
$dir = "./downloads";
$newstamp = 0;
$newname = "";
$dc = opendir($dir);
while ($fn = readdir($dc)) {
# Eliminate current directory, parent directory
if (ereg('^\.{1,2}$',$fn)) continue;
$timedat = filemtime("$dir/$fn");
if ($timedat > $newstamp) {
$newstamp = $timedat;
$newname = $fn;
}
}
// $newname contains the name of the most recently updated file
// $newstamp contains the time of the update to $newname
?>