list category posts page template v1.1

<?php
/**
 * Template Name: List Category Posts Page
 *
 * a page template to incorporate the 'List Category Posts' functionality
 * v1.1
 * @package WordPress
 * @subpackage Twenty Ten / Weaver2010
 * @since 3.0.0
 * adapted by Michael Stolze / aka alchymyth 08/2011
 *
 * instruction for the 'shortcode':
 * syntax: [catlist id=3,7 numberposts=-1 excerpt=yes]
 * id: a comma separated list of category ids;
 * numberposts: the number of posts per page;
 * excerpt: defaults to 'yes', any different values are ignored.
 *
 * Regardless of the 'shortcode' position in the content of the page,
 * it will be shown at the bottom of the page; all other page content wil be shown at the top.
 */
?>
<?php if(function_exists('catlist_func')) remove_shortcode( 'catlist', array('ListCategoryPosts', 'catlist_func') ); ?>

<?php get_header(); ?>
    <div id="container">
    <?php ttw_put_ttw_widgetarea('top-widget-area','ttw-top-widget','ttw_hide_widg_pages'); ?>
    <div id="content">

        <?php the_post(); ?>
        <div id="post-<?php the_ID(); ?>" <?php post_class(); ?>>

            <h1 class="entry-title"><?php the_title(); ?></h1>

            <div class="entry-content">
                <?php // remove the 'catlist' shortcode section from the page content //
                $the_content = preg_replace('~\[catlist([^\[\]]+)\]~is', '', get_the_content());
                echo apply_filters('the_content', $the_content); ?>
                <?php wp_link_pages( array( 'before' => '<div class="page-link">' . __( 'Pages:', TTW_TRANS ), 'after' => '</div>' ) ); ?>
                <?php edit_post_link( __( 'Edit', TTW_TRANS ), '<span class="edit-link">', '</span>' ); ?>
            </div><!-- .entry-content -->

<?php //start of 'List Category Posts' section; // ?>

            <?php //get the shortcode values from the page content, by using a regex //
            preg_match_all('~\[catlist([^\[\]]+)\]~is', get_the_content(), $short); $short = $short[1];
            $shortcode = $short[0];
            preg_match_all('~id=([0-9,]+)\b~is', $shortcode, $id);
            $cat_ids = $id[1][0]; $cat_id = explode(',', $cat_ids);
            preg_match_all('~numberposts=(-([0-9]+)|([0-9]+))\b~is', $shortcode, $numberposts);
            $cat_numbers = $numberposts[1][0];
            if(!$cat_numbers) $cat_numbers = get_option('posts_per_page');
            preg_match_all('~excerpt=(yes|no)\b~is', $shortcode, $excerpt);
            $cat_excerpt = $excerpt[1][0];

            //start the 'list category posts' query //
            $temp_post = $post; $temp = $wp_query; //save original query
            $wp_query = new WP_query(array('category__in' => $cat_id, 'posts_per_page' => $cat_numbers, 'paged' => get_query_var('paged') ));
            if( $wp_query->have_posts() ) : ?>
            <div class="entry-content">
            <ul class="lcp_catlist">
            <?php while( $wp_query->have_posts() ) : $wp_query->the_post(); ?>
            <li><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
            <?php if($post->post_excerpt){ //rebuild the 'list catgory posts' excerpt
                    $lcp_excerpt = $post->post_excerpt;
            } else {
            $lcp_excerpt = strip_tags($post->post_content); }
            if ( post_password_required($post) ) {
                    $lcp_excerpt = __('There is no excerpt because this is a protected post.');
            }
            if (strlen($lcp_excerpt) > 255) {
                    $lcp_excerpt = substr($lcp_excerpt, 0, 252) . '...';
            } ?>
            <div class="lcp_excerpt"><?php echo $lcp_excerpt; ?></div>
            </li><br /><br />
            <?php endwhile; ?>
            </ul>
            </div><!-- .entry-content of category posts -->

        <?php if (  $wp_query->max_num_pages > 1 ) : ?>
        <div id="nav-below" class="navigation">
        <div class="nav-previous"><?php next_posts_link( __( '<span class="meta-nav">&larr;</span> Older posts', TTW_TRANS ) ); ?></div>
        <div class="nav-next"><?php previous_posts_link( __( 'Newer posts <span class="meta-nav">&rarr;</span>', TTW_TRANS ) ); ?></div>
        </div><!-- #nav-below -->
        <?php endif; // end of pagination ?>
            <?php $wp_query = $temp; $post = $temp_post; //restore original query ?>
            <?php endif; ?>

<?php //end of 'List Category Posts' section ?>
<?php remove_shortcode( 'catlist', 'ListCategoryPostsArgs' );
if(function_exists('catlist_func')) add_shortcode( 'catlist', array('ListCategoryPosts', 'catlist_func') ); ?>

            </div><!-- #post-<?php the_ID(); ?> -->

    </div><!-- #content -->
    <?php ttw_put_ttw_widgetarea('bottom-widget-area','ttw-bot-widget','ttw_hide_widg_pages'); ?>
    </div><!-- #container -->
<?php get_sidebar(); ?>
<?php get_footer(); ?>