So I figured out I needed to encode the url properly. I'm not sure if this code is optimal, but it works.. and could hopefully help someone else.
$parsedUrl = parse_url('http://lp.hm.com/hmprod?set=key[source],value[/model/2012/P01 05156 06204 80 1175 4.jpg]&set=key[rotate],value[]&set=key[width],value[]&set=key[height],value[]&set=key[x],value[]&set=key[y],value[]&set=key[type],value[STILL_LIFE_FRONT]&call=url[file:/product/large]');
$info = pathinfo($parsedUrl['path']);
$dirname = explode('/', $info['dirname'] ?: '');
$dirname = array_filter($dirname, 'strlen');
$dirname = array_map('urlencode', $dirname);
$dirname = implode('/', $dirname);
$basename = urlencode($info['basename'] ?: '');
$path = array_filter(array($dirname, $basename), 'strlen');
$path = '/' . implode('/', $path);
$query = explode('&', $parsedUrl['query'] ?: '');
foreach ($query as &$set)
{
$set = explode('=', $set, 2);
$set = array_map('urlencode', $set);
$set = implode('=', $set);
}
$query = implode('&', $query);
$uri = array_filter(array($path, $query), 'strlen');
$uri = implode('?', $uri);
$fragment = urlencode($info['fragment'] ?: '');
$uri = array_filter(array($uri, $fragment), 'strlen');
$uri = implode('#', $uri);
$scheme = $parsedUrl['scheme'] ?: '';
$host = $parsedUrl['host'] ?: '';
$url = array_filter(array($scheme, $host), 'strlen');
$url = implode('://', $url);
$url .= $uri;
$image = new Imagick($url);
OBS!
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