Eventverwaltung Deutsches Datum speichern und ausgeben

<?php
/*
Plugin Name: My Events
Description: Einfache Benutzerdefiniert Post Typen My Event anlegen und verwalten
Author: Matthias
Version: 0.0.1
Author URI: http://www.wandernimsaaletal.de
*/
/*  Copyright 2014  Matthias Reichert
*/


add_action('init', 'event_register');
function event_register() {
 $labels = array(
  'name' => _x('Events', 'post type general name'),
  'singular_name' => _x('Event', 'post type singular name'),
  'add_new' => _x('Add New', 'event'),
  'add_new_item' => __('Add New Event'),
  'edit_item' => __('Edit Event'),
  'new_item' => __('New Event'),
  'view_item' => __('View Event'),
  'search_items' => __('Search Events'),
  'not_found' =>  __('Nothing found'),
  'not_found_in_trash' => __('Nothing found in Trash'),
  'parent_item_colon' => ''
 );
 $args = array(
  'labels' => $labels,
  'public' => true,
  'publicly_queryable' => true,
  'show_ui' => true,
  'query_var' => true,
  'rewrite' => true,
  'capability_type' => 'post',
  'hierarchical' => false,
  'menu_position' => null,
  'supports' => array('title','editor','thumbnail',)
   );
 register_post_type( 'events' , $args );
}
// Spalten hinzufügen
add_action("manage_posts_custom_column",  "events_custom_columns");
add_filter("manage_events_posts_columns", "events_edit_columns");
function events_edit_columns($columns){
    $columns = array(
        "cb" => "<input type=\"checkbox\" />",
        "title" => "Event",
        "event_date" => "Event Date",
        "event_location" => "Location",
        "event_city" => "City",
  );
  return $columns;
}
function events_custom_columns($column){
    global $post;
    $custom = get_post_custom();
    switch ($column) {
    case "event_date":
            echo format_date($custom["event_date"][0]) . '<br /><em>' .
            $custom["event_start_time"][0] . ' - ' .
            $custom["event_end_time"][0] . '</em>';
            break;
    case "event_location":
            echo $custom["event_location"][0];
            break;
 case "event_city":
            echo $custom["event_city"][0];
            break;
    }
}
// Einträge sortieren
add_filter("manage_edit-events_sortable_columns", "event_date_column_register_sortable");
add_filter("request", "event_date_column_orderby" );
function event_date_column_register_sortable( $columns ) {
        $columns['event_date'] = 'event_date';
        return $columns;
}
function event_date_column_orderby( $vars ) {
    if ( isset( $vars['orderby'] ) && 'event_date' == $vars['orderby'] ) {
        $vars = array_merge( $vars, array(
            'meta_key' => 'event_date',
            'orderby' => 'meta_value_num'
        ) );
    }
    return $vars;
}
// Meta Box für die Details 
add_action("admin_init", "events_admin_init");
function events_admin_init(){
  add_meta_box("event_meta", "Event Details", "event_details_meta", "events", "normal", "default");
}
// Datunsformat
function get_default_date_format() {
    return 'Y-m-d H:i:s';
}
function event_details_meta() {
   //Das post-Objekt einlesen
  global $post;
   //Metadaten des Posts ermitteln (falls Event bearbeitet wird,
   //sollen sofort die gespeicherten Werte angezeigt werden!)
  
 echo '<div class="meta_box_work">';
 
  echo'<label><span>An welchem Datum und zu welcher Zeit beginnt die Veranstaltung.</span></label>';
  
 echo '<p><label><b>Datum:</b><label>';  
 echo '<input type="text" name="event_date" value="' . get_event_field("event_date") . '" /> <em> Format:YYYY.dd.mm</em> ';
 
 // event_start_time
 echo '</p><p><label>Start: </label><input type="text" name="event_start_time" value="' . get_event_field("event_start_time") . '" /><em>(hh:mm) oder (00:00)</em></p>';
 
 // event_end_time
 echo '<p><label>End Time: </label><input type="text" name="event_end_time" value="' . get_event_field("event_end_time") . '" /> <em>((hh:mm) oder (00:00))</em> </p>';
 
 // event_location
 echo '<p><label>Location: </label><input type="text" size="70" name="event_location" value="' . get_event_field("event_location") . '" /></p>';
 
 // event_location_url
 echo '<p><label>Location URL: </label><input type="text" size="70" name="event_location_url" value="' . get_event_field("event_location_url") . '" /></p>';
 echo '</div>';
}
// Daten holen wenn vorhanden
function get_event_field($event_field) {
    global $post;
    $custom = get_post_custom($post->ID);
    if (isset($custom[$event_field])) {
        return $custom[$event_field][0];
    }
}
// Daten speichern
add_action('save_post', 'save_event_details');
function save_event_details(){
   global $post;
   if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )
      return;
   if ( get_post_type($post) == 'event')
      return;
   
   save_event_field("event_date");
   save_event_field("event_start_time");
   save_event_field("event_end_time");
   save_event_field("event_location");
   save_event_field("event_location_url");
}
function save_event_field($event_field) {
    global $post;
    if(isset($_POST[$event_field])) {
        update_post_meta($post->ID, $event_field, $_POST[$event_field]);
    }
}
// Shortcode Ausgabe
//[myevents]
function get_events_shortcode($atts){
    global $post;


 $args = array(
  'post_type' => 'events', // enter your custom post type
  'orderby' => 'menu_order',
  'order' => 'ASC',
  'posts_per_page'=> '2',  // overrides posts per page in theme settings
  'paged' => $paged, // Pagination page
 );
 
 $loop = new WP_Query( $args );
 
 if( $loop->have_posts() ):
  
  echo '<h3> <u> Aktuelle Wandertermine: </u></h3>';
      
  while( $loop->have_posts() ): $loop->the_post();
            //the_post();
   
   $titel   = the_title( '<b><u>', '</u></b>' );
   $my_eventdate = get_post_meta( get_the_ID(), 'event_date', true );
   $my_content1  = get_post_meta( get_the_ID(), 'event_start_time', true );
   $my_content2  = get_post_meta( get_the_ID(), 'event_end_time', true );
   $my_content3  = get_post_meta( get_the_ID(), 'event_location', true );
   
   
    
      echo '<section class="event_container past">';
      echo ''.$titel.' <br> <b>Wann:</b> '.$my_eventdate.'&nbsp;';
   echo '<b>Treffpunkt:</b> '.$my_content3 .',<br> <b>Start:</b> '.$my_content1.' - <b>R&uuml;ckkehr:</b> '.$my_content2.' </p>';
      echo '</section>';
        endwhile;
    endif;
    wp_reset_query();
}
add_shortcode( 'events', 'get_events_shortcode' );
 
?>