$image = "http://xxx.xxx.xxx.xxx/cgi-bin/snapshot.sh?res=low&watermark=no";
$imageData = base64_encode(file_get_contents($image));
$src = 'data: '.mime_content_type($image).';base64,'.$imageData;
echo '<img src="' . $src . '">';

$data = $src;
$d = date('Y-m-d H:i:s');
$filesave = "./security/C1.".$d.".png";
list($type, $data) = explode(';', $data);
list(, $data)      = explode(',', $data);
$data = base64_decode($data);
file_put_contents($filesave, $data);