Create a custom loop for an AppPresser page

apppresser-custom-loop.php

/* Custom Loop for a page in an AppPresser app */

function app_custom_loop( $content ) {
	
	// edit this with your desired page slug
	if( is_page( 'featured' ) ) {
	  
	  // add your custom query args here
	  $args = array();
		
		$the_query = new WP_Query( $args );
		
		// The Loop
		
		if ( $the_query->have_posts() ) {
			$content .= '<ul class="list list-full" style="margin:-10px -10px 0 -10px">';
			while ( $the_query->have_posts() ) {
				$the_query->the_post();
				$content .= '<li class="post-list-item"><a class="item item-thumbnail-left item-text-wrap" href="' . get_the_permalink() . '">';
				$content .= '<img src="' . get_stylesheet_directory_uri() . '/images/thumbnail.jpg">';
				$content .= '<div class="item-title">'. get_the_title() .'</div>';
			    // $content .= '<div class="item-text">' . the_excerpt() . '</div>';
			    $content .= '</a></li>';
			}
			$content .= '</ul>';
		} else {
			$content .= 'We couldn\'t find anything here, sorry!'; // no posts found
		}
		/* Restore original Post Data */
		wp_reset_postdata();

	}
	
	return $content;
	
}
add_filter( 'the_content', 'app_custom_loop' );