问在PHP中通过编程从图像URLS数组中选择最大的图像？

EN

$files = array_combine($filenames,
  array_map("array_sum", array_map("getimagesize", $filenames))
);
arsort($files);

print key($files);    # largest image

$largest = -1;
$largest_image = null;

foreach ($images as $image)
{
    $size = getimagesize($image);
    $val = $size[0] * $size[1];
    if ($val > $largest)
    {
        $largest_image = $image;
        $largest = $val;
    }
}
if ($largest_image != null) 
{
   // do magic
}