WordPress shortcode for 'Recent comments'

// Get WordPress recent comments via shortcode: [iw_recent_comments]
function iw_recent_comments_shortcode( $atts ) {
	extract( shortcode_atts( array(
		'author__not_in' => '',
		'number' => '8',
		'order' => 'DESC',
		'avatar' => 'show',
		'author' => 'show',
		'date' => 'show',
		'object' => 'show',
		'excerpt' => 'show'
	), $atts ) );

	$args = array(
		'author__not_in' => $author__not_in,
		'number' => $number,
		'order' => $order,
		'status' => 'approve'
	);

	$comments = get_comments( $args );

	$content = '';

	$content .= '<div uk-slider="finite: true">';
	$content .= '<div class="uk-position-relative uk-visible-toggle">';
	$content .= '<ul class="uk-slider-items uk-child-width-1-2@m uk-grid uk-grid-match">';
	foreach( $comments as $comment ) {
		$rating = get_comment_meta( $comment->comment_ID, 'rating', true );
		$content .= '<li>';
		$content .= '<div class="uk-card uk-card-default uk-card-body">';
		$content .= '<div class="uk-grid-small uk-flex-middle" uk-grid>';
		$content .= '<div class="uk-width-auto">';
		if ( $avatar == 'show' ) {
			$content .= get_avatar( $comment, 60 );
		}
		$content .= '</div>';
		$content .= '<div class="uk-width-expand">';
		$content .= '<div class="uk-grid-collapse" uk-grid>';
		if ( $author == 'show' ) {
			$content .= '<div class="uk-width-expand">';
			$content .= '<h3 class="uk-card-title uk-margin-remove-bottom uk-text-truncate">' . $comment->comment_author . '</h3>';
		if ( $date == 'show' ) {
			$content .= '<p class="uk-text-meta uk-margin-remove-top">' . mysql2date(get_option('date_format'), $comment->comment_date) . '</p>';
		}
		$content .= '</div>';
		$content .= '<div class="uk-width-auto">';

		if ($rating != 0)
		{
			$content .= '<h3 class="uk-card-title"><div style="margin-top: -2px">';
			foreach (array(1,2,3,4,5) as $val)
			{
				$size	= '20';
				$score	= $rating - $val;
				if ($score >= 0)
				{
				$content .= '<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="' . $size . '" height="' . $size . '" viewBox="0 0 1792 1792"><path d="M1728 647q0 22-26 48l-363 354 86 500q1 7 1 20 0 21-10.5 35.5t-30.5 14.5q-19 0-40-12l-449-236-449 236q-22 12-40 12-21 0-31.5-14.5t-10.5-35.5q0-6 2-20l86-500-364-354q-25-27-25-48 0-37 56-46l502-73 225-455q19-41 49-41t49 41l225 455 502 73q56 9 56 46z" fill="#f7c725"></path></svg>';
				} else if ($score > -1 && $score < 0) {
				$content .= '<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="' . $size . '" height="' . $size . '" viewBox="0 0 1792 1792"><path d="M1250 957l257-250-356-52-66-10-30-60-159-322v963l59 31 318 168-60-355-12-66zm452-262l-363 354 86 500q5 33-6 51.5t-34 18.5q-17 0-40-12l-449-236-449 236q-23 12-40 12-23 0-34-18.5t-6-51.5l86-500-364-354q-32-32-23-59.5t54-34.5l502-73 225-455q20-41 49-41 28 0 49 41l225 455 502 73q45 7 54 34.5t-24 59.5z" fill="#f7c725"></path></svg>';
				} else {
				$content .= '<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="' . $size . '" height="' . $size . '" viewBox="0 0 1792 1792"><path d="M1201 1004l306-297-422-62-189-382-189 382-422 62 306 297-73 421 378-199 377 199zm527-357q0 22-26 48l-363 354 86 500q1 7 1 20 0 50-41 50-19 0-40-12l-449-236-449 236q-22 12-40 12-21 0-31.5-14.5t-10.5-35.5q0-6 2-20l86-500-364-354q-25-27-25-48 0-37 56-46l502-73 225-455q19-41 49-41t49 41l225 455 502 73q56 9 56 46z" fill="#ccc"></path></svg>';
				}
			}
			$content .= '</div></h3>';
		}

		$content .= '</div>';
		}
		$content .= '</div>';
		$content .= '</div>';
		$content .= '<blockquote>';
		if ( $excerpt == 'show' ) {
			$content .= get_comment_excerpt( $comment->comment_ID );
		}
		if ( $object == 'show' ) {
			$content .= '<footer><a href="' . esc_url( get_permalink( $comment->comment_post_ID ) ) . '">' . get_the_title( $comment->comment_post_ID ) . '</a></footer>';
		}
		$content .= '</blockquote>';
		$content .= '</div>';
		$content .= '</div>';
		$content .= '</li>';
	}
	$content .= '</ul>';
	$content .= '</div>';
	$content .= '<ul class="uk-slider-nav uk-dotnav uk-flex-center uk-margin"></ul>';
	$content .= '</div>';

	return $content;
}
add_shortcode( 'iw_recent_comments', 'iw_recent_comments_shortcode' );