random-slider.php

function lucida_post_page_category_slider( $options ) {
	global $post;

	$quantity     = $options['featured_slider_number'];
	$no_of_post   = 0; // for number of posts
	$post_list    = array();// list of valid post/page ids
	$type         = $options['featured_slider_type'];
	$show_content = $options['featured_slider_content_show'];
	$output     = '';

	$args = array(
		'post_type'           => 'any',
		'orderby'             => 'rand(x)',
		'order'				  => 'DESC',
		'ignore_sticky_posts' => 1 // ignore sticky posts
	);

	//Get valid number of posts
	if( 'post' == $type || 'page' == $type  ) {
		for( $i = 1; $i <= $quantity; $i++ ){
			$post_id = '';

			if( 'post' == $type ) {
				$post_id = isset( $options['featured_slider_post_' . $i] ) ? $options['featured_slider_post_' . $i] : false;
			}
			elseif( 'page' == $type ) {
				$post_id = isset( $options['featured_slider_page_' . $i] ) ? $options['featured_slider_page_' . $i] : false;
			}

			if ( $post_id && '' != $post_id ) {
				$post_list = array_merge( $post_list, array( $post_id ) );

				$no_of_post++;
			}
		}

		$args['post__in'] = $post_list;
	}
	elseif( 'category' == $type ) {
		$no_of_post = $quantity;

		$args['category__in'] = $options['featured_slider_select_category'];
	}

	if ( 0 == $no_of_post ) {
		return;
	}

	$args['posts_per_page'] = $no_of_post;

	$loop = new WP_Query( $args );
	$i=0;
	while ( $loop->have_posts()) : $loop->the_post(); $i++;

		$title_attribute = the_title_attribute( 'echo=0' );

		if ( $i == 1 ) {
			$classes = 'post post-'.$post->ID.' hentry slides displayblock';
		} else {
			$classes = 'post post-'.$post->ID.' hentry slides displaynone';
		}

		$output .= '
		<article class="' . $classes . '">
			<figure class="slider-image">';
			if ( has_post_thumbnail() ) {
				$output .= '<a title="' . $title_attribute . '" href="' . esc_url( get_permalink() ) . '">
					'. get_the_post_thumbnail( $post->ID, 'lucida-slider', array( 'title' => $title_attribute, 'alt' => $title_attribute, 'class'	=> 'attached-post-image' ) ).'
				</a>';
			}
			else {
				//Default value if there is no first image
				$lucida_image = '<img class="wp-post-image" src="'.esc_url( get_template_directory_uri() ).'/images/gallery/no-featured-image-1920x800.jpg" >';

				//Get the first image in page, returns false if there is no image
				$lucida_first_image = lucida_get_first_image( $post->ID, 'lucida-slider', array( 'title' => $title_attribute, 'alt' => $title_attribute, 'class' => 'attached-post-image' ) );

				//Set value of image as first image if there is an image present in the page
				if ( '' != $lucida_first_image ) {
					$lucida_image =	$lucida_first_image;
				}

				$output .= '<a title="' . $title_attribute . '" href="' . esc_url( get_permalink() ) . '">
					'. $lucida_image .'
				</a>';
			}

			$output .= '
			</figure><!-- .slider-image -->
			<div class="slider-content-wrapper">
				<div class="entry-container">
					<header class="entry-header">
						<h2 class="entry-title">
							<a title="' . $title_attribute . '" href="' . esc_url( get_permalink() ) . '">'.the_title( '<span>','</span>', false ).'</a>
						</h2>
						<p class="entry-meta">' . lucida_page_post_meta() . '</p><!-- .entry-meta -->
					</header>
						';

					if ( 'excerpt' == $show_content ) {
						$excerpt = get_the_excerpt();

						$output .= '<div class="entry-summary"><p>' . $excerpt . '</p></div><!-- .entry-summary -->';
					} elseif ( 'full-content' == $show_content ) {
						$content = apply_filters( 'the_content', get_the_content() );
						$content = str_replace( ']]>', ']]&gt;', $content );
						$output .= '<div class="entry-content">' . wp_kses_post( $content ) . '</div><!-- .entry-content -->';
					}

					$output .= '
				</div><!-- .entry-container -->
			</div><!-- .slider-content-wrapper -->
		</article><!-- .slides -->';
	endwhile;

	wp_reset_postdata();

	return $output;
}