Function latest post in wordpress -

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i have next code show latest post in wordpress. want add thumbnail , date. suggestion?

function last_article($atts){    extract(shortcode_atts(array(       'posts' => 1,    ), $atts));     $return_string = '<ul>';    query_posts(array('orderby' => 'date', 'order' => 'desc' , 'showposts' => $posts));    if (have_posts()) :        while (have_posts()) : the_post();          $return_string .= '<li><a href="'.get_permalink().'">'.get_the_title().'</a></li>';       endwhile;    endif;    $return_string .= '</ul>';     wp_reset_query();    return $return_string; }

your shortcode pure evil. should never ever use extract(). extract() removed wordpress core. should tell how bad extract() is. see corresponding trac ticket here

also, never ever use query_posts.

note: function isn't meant used plugins or themes. explained later, there better, more performant options alter main query. query_posts() overly simplistic , problematic way modify main query of page replacing new instance of query. inefficient (re-runs sql queries) , outright fail in circumstances (especially when dealing posts pagination).

you should using wp_query

you should visit shortcode api in codex , see how construct shortcode

with in mind, code should this

function last_article($atts){     $a = shortcode_atts( array(         'posts' => 1,     ), $atts );     $return_string = '<ul>';    $q = new wp_query(array('orderby' => 'date', 'order' => 'desc' , 'posts_per_page' => $a['posts']));    if ($q->have_posts()) {        while ($q->have_posts()) {           $q->the_post();           $return_string .= '<li>'.the_date().'</li>';          $return_string .= '<li><a href="'.get_permalink().'">'.get_the_title().'</a></li>';          if (has_post_thumbnail()) {              $return_string .= '<li>'.the_post_thumbnail().'</li>';          }       }    }    $return_string .= '</ul>';     wp_reset_postdata();    return $return_string; }

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