Create a combined image. Requires PHP with GD support.

gistfile1.php

#!/usr/bin/php
<?php

$Images = array();
$img = '';
$r = 0.5;
$H = 300;
$W = 0;

for($i=1; $i<$argc; $i++)
	{
	if($img=@ImageCreateFromJPEG($argv[$i]))
		{
		$Images[] = $img;
		$W += floor($H*$r*ImageSX($img)/ImageSY($img));
		}
	}

$back = 0;

if(count($Images))
	{
	$img = ImageCreateTrueColor($W+(count($Images)+1)*2, $H+4);
	$back = ImageColorAllocate($img, 60,60,60);
	$bord = ImageColorAllocate($img, 255,255,255);
	$shadow = ImageColorAllocateAlpha($img, 0,0,0, 80);
	ImageFilledRectangle($img, 0,0, $W+(count($Images)+1)*2, $H+4, $back);
	}

$p=2;
foreach($Images as $orig)
	{
	$ow = ImageSX($orig);
	$oh = ImageSY($orig);

	$w = floor($H*$r*$ow/$oh);

	ImageCopyResampled($img, $orig, $p,2, floor((1.0-$r)*$ow/2),0, $w,$H, floor($r*$ow),$oh);
	ImageRectangle($img, $p,2, $p+$w-1,$H+1, $bord);
	ImageRectangle($img, $p+1,3, $p+$w-2,$H, $shadow);

	$p+=$w+2;

	ImageDestroy($orig);
	}

Header('Content-type: image/jpeg');
ImageJPEG($img, '', 95);
ImageDestroy($img);

?>