Profile: larryL

add_shortcode( 'num-days', 'wpv_num_days_shortcode');
function wpv_num_days_shortcode( $atts ) {
  $atts = shortcode_atts( array(
      'postid' => ''
  ), $atts );
  $timestamp = get_the_date( 'U', $atts['postid'] );
  if( $timestamp != '') {
    $age = floor((time() - $timestamp) / ( 60*60*24 )) ;
    return $age;
  }else {
    return 0;
  }
}

[num-days postid="[wpv-post-id]"]