require 'color.php';
$image = 'https://cdn.pixabay.com/photo/2012/11/24/07/43/colorful-67134_960_720.jpg'
$default_color = 'ffffff';
echo fast_color_thief($image, $default_color);

require 'color.php';
foreach(glob('./demo/*.{jpg,png,gif}', GLOB_BRACE) as $img) {
  $default_color = 'ff0000';
  $color = simple_color_thief($img, $default_color);
  $style = 'width:26%;padding:50px;background:#'.$color.';display:inline-block';
  echo '<div style="'.$style.'">';
  echo '<img style="height:200px" src="'.$img.'">';
  echo '</div>';
}