A simple WordPress

wpmark-page-children-shortcode.php

<?php
/*
Plugin Name: wpamrk Page Children Shortcode
Plugin URI: http://markwilkinson.me
Description: A shortcode that outputs the current pages children either with or without their featured image.
Version: 0.1
Author: Mark Wilkinson
Author URI: http://http://markwilkinson.me/
*/

/***************************************************************
* Function wpmark_shortcode_list_chidren()
* Shortcode function to list the current pages children
***************************************************************/
function wpmark_shortcode_list_chidren( $atts ) {
	
	/* extract the shortcode args, making each available as $variable */
	extract( shortcode_atts(
		array(
			'images' => 'false',
		),
	$atts )
	);
	
	global $post;
	
	/* set query args */
	$wpmark_children_args = array(
		'post_type' => 'page',
		'posts_per_page' => -1,
		'post_parent' => $post->ID,
	);
	
	/* build the new query */
	$wpmark_children = new WP_Query( $wpmark_children_args );
	
	/* check we have children */
	if( $wpmark_children->have_posts() ) {
		
		/* check whether we are including the featured image */
		if( $images == 'false' ) {
		
			$html = '<ul class="list-children">';
		
		}
				
		/* loop through posts */
		while( $wpmark_children->have_posts() ) : $wpmark_children->the_post();
		
			/* check whether we are including the featured image */
			if( $images == 'true' ) {
				
				$html .= '<div id="childpage-' . get_the_ID(). '" class="list-children-page list-children-page-' . get_the_ID() . '"><h2 class="child-title">' . get_the_title() . '</h2>';
				
				$html .= '<div class="child-image">' . get_the_post_thumbnail( $post->ID, 'large' ) . '</div>';
				
				$html .= '<div class="child-content">' . wpautop( get_the_excerpt() ) . '<p class="child-link"><a href="' . get_permalink() . '">Read more &raquo;</a></p></div><div style="clearfix"></div>';
				
				$html .= '</div>';
			
			/* not including featured images */
			} else {
				
				$html .= '<li id="childpage-' . get_the_ID(). '" class="list-children-page list-children-page-' . get_the_ID() . '"><a href="' . get_permalink() . '">' . get_the_title() . '</a></li>';
				
			}
		
		/* end loop */
		endwhile;
		
		/* check whether we are including the featured image */
		if( $images == 'false' ) {
			
			$html .= '</ul>';
			
		}
		
	}
	
	/* reset the query */
	wp_reset_query();
	
	return $html;

}

add_shortcode( 'wpmark_list_children', 'wpmark_shortcode_list_chidren' );