Minimal (or max) uploaded image dimensions in wordpress

// min image dimensions warning
add_action('admin_init', function(){
    add_settings_field(
        'min_width',
        'Minimal image upload width',
        'min_width_fn',
        'media'
    );
    register_setting(
        'media',
        'min_width'
    );
    function min_width_fn(){
        echo('<input id="min_width" name="min_width" type="number" value="' . get_option('min_width') . '" />');
    }
    add_settings_field(
        'min_height',
        'Minimal image upload height',
        'min_height_fn',
        'media'
    );
    register_setting(
        'media',
        'min_height'
    );
    function min_height_fn(){
        echo('<input id="min_height" name="min_height" type="number" value="' . get_option('min_height') . '" />');
    }
});

add_filter('wp_handle_upload_prefilter','duuuda_handle_upload_prefilter');
function duuuda_handle_upload_prefilter($file)
{
    if ( $file['error'] != '0'  || empty(get_option('min_width')) || empty(get_option( 'min_height', '' ))) // there's already an error
		return $file;

    $img = getimagesize($file['tmp_name']);
    $minWidth = get_option('min_width');
    $minHeight = get_option('min_height');
    $width = $img[0];
    $height = $img[1];

    if ($width < $minWidth || $height <  $minHeight){
        $file['error'] = sprintf( __( 'Image dimensions are too small. Minimum image size is %1$sx%2$spx. Uploaded image size is %3$sx%4$spx.' ), get_site_option('min_width'), get_site_option('min_height'), $width, $height );
        "Image dimensions are too small. Minimum image size is {$minWidth}x{$minHeight}px. Uploaded image size is {$width}x{$height}px";
    }

    return $file; 
}