Download image from remote website and show to use - php

Question

What is the quickest most memory efficient way to download a remote image and then display that to the user? - Note I don't want to save it, I just want to pass it on to the user.
i.e.
a user goes to www.website.com/image1.jpg
In the background I would use a getFile script similar to this to retrieve the file, but how do I display this to the user and is this a memory efficient way of doing it?
function getUrl($url, $method='', $vars='', $fh = '') {
$ch = curl_init();
if ($method == 'post') {
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $vars);
}
if ($fh != '')
{
curl_setopt($ch, CURLOPT_FILE, $fh);
}
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_COOKIEJAR, 'cookies/cookies.txt');
curl_setopt($ch, CURLOPT_COOKIEFILE, 'cookies/cookies.txt');
$buffer = curl_exec($ch);
curl_close($ch);
return $buffer;
}

Answer 1

Here it is:
function proxyImage( $fromHost, $path, $bufsize=4096 ) {
$conn = fsockopen($fromHost,80);
fwrite( $conn, "GET {$path} HTTP/1.0\r\n" );
fwrite( $conn, "Host: {$fromHost}\r\n" );
fwrite( $conn, "User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20100101 Firefox/8.0\r\n" );
fwrite( $conn, "Connection: close\r\n" );
fwrite( $conn, "\r\n" );
$answer = '';
while( !feof($conn) and !$bodystarted ) {
$portion = fread( $conn, $bufsize );
if( strpos($portion,"\r\n\r\n")!==false ) $bodystarted = true;
$answer .= $portion;
}
list( $headers, $bodypart ) = explode( "\r\n\r\n", $answer, 2 );
foreach( explode("\r\n",$headers) as $h )
header($h);
echo $bodypart;
while( !feof($conn) )
echo fread( $conn, $bufsize );
fclose($conn);
}
proxyImage( 'www.newyorker.com', '/online/blogs/photobooth/NASAEarth-01.jpg' );