Mediathek lädt nicht mehr, Bilderupload defekt

<?php


//----------------------------------------------------------------menus
function register_my_menus() {


  register_nav_menus( array(
    'Hauptmenue' => ( 'Hauptmenü' ),
    'Menue unten' => ( 'Unteres Menü' ),
) );


}
 add_action ('init', 'register_my_menus');


//----------------------------------------------------------------modify wrapper
//Deletes all CSS classes and id's, except for those listed in the array below
function custom_wp_nav_menu($var) {
        return is_array($var) ? array_intersect($var, array(
                //List of allowed menu classes
                'current_page_item',
                'current_page_parent',
                'current_page_ancestor',
                'first',
                'last',
                'vertical',
                'horizontal'
                )
        ) : '';
}
add_filter('nav_menu_css_class', 'custom_wp_nav_menu');
//add_filter('nav_menu_item_id', 'custom_wp_nav_menu');
add_filter('page_css_class', 'custom_wp_nav_menu');
 
//Replaces "current-menu-item" with "active"
function current_to_active($text){
        $replace = array(
                //List of menu item classes that should be changed to "active"
                'current_page_item' => 'active',
                'current_page_parent' => 'active',
                'current_page_ancestor' => 'active',
        );
        $text = str_replace(array_keys($replace), $replace, $text);
                return $text;
        }
add_filter ('wp_nav_menu','current_to_active');
 
//Deletes empty classes and removes the sub menu class
function strip_empty_classes($menu) {
    $menu = preg_replace('/ class=""| class="sub-menu"/','',$menu);
    return $menu;
}
add_filter ('wp_nav_menu','strip_empty_classes');


//----------------------------------------------------------------sidebars
function IHC_widgets_init() {
    register_sidebar( array(
        'name'          => __( 'Aktuelle News', 'IHC' ),
        'id'            => 'news',
        'description'   => __( 'Zeigt die aktuelle Newsmeldung an', 'IHC' ),
        'before_widget' => '<div class="mq">',
        'after_widget'  => '</div>',
        'before_title'  => '<span class="none">',
        'after_title'   => '</span>',
    ) );
        
        register_sidebar( array(
        'name'          => __( 'Sidebar', 'IHC' ),
        'id'            => 'sidebar',
        'description'   => __( 'Rechts neben dem Hauptbereich', 'IHC' ),
        'before_widget' => '<div class ="row">',
        'after_widget'  => '</div>',
        'before_title'  => '<span class="">',
        'after_title'   => '</span>',
    ) );


        register_sidebar( array(
        'name'          => __( 'Suche', 'IHC' ),
        'id'            => 'suche',
        'description'   => __( 'Suchfeld unten', 'IHC' ),
        'before_widget' => '',
        'after_widget'  => '',
        'before_title'  => '<span class="none">',
        'after_title'   => '</span>',
    ) );
}
add_action( 'widgets_init', 'IHC_widgets_init' );


//----------------------------------------------------------------custom header image
//http://www.wordpresstutorials.de/2013/06/19/custom-header-fuer-eigenes-theme
// Action Hook, der die Theme-Funktionen initialisiert
add_action('after_setup_theme', 'theme_setup');
 
// Unsere Theme-Setup-Funktionen mit allen wichtigen WordPress-Funktionen, die ausgeführt werden sollen.
// In diesem Fall unsere Custom-Header-Funktion
function theme_setup(){
$args = array(
    'flex-height'            => true, /* Flexible Höhe (true|false) */
    'height'                 => 164, /* Höhe des Header */
    'flex-width'             => true, /* Flexible Weite (true|false) */
    'width'                  => 1120, /* Weite des Headers */
    'default-image'          => get_template_directory_uri() . '/header.png', /* Standard-Bild des Headers */
    'random-default'         => false, /* Zufallsdurchlauf, wenn es mehrere Bilder gibt */
    'header-text'            => false, /* Header-Text aktivieren oder abschalten */
    'uploads'                => true, /* User-Uploads erlauben */
);
add_theme_support( 'custom-header', $args );
}
//Bilder vorgeben
register_default_headers( array(
    'standard' => array(
        'url' => '%s/header.png', /* URL zum Bild */
        'thumbnail_url' => '%s/header-thumb.png', /* URL zum Thumbnail (130px*66px) */
        'description' => __( 'Headerbild' ) /* Bildbeschreibung */
    )
));


/*******************************************************************
 *         WordPress die letzten Beiträge anzeigen                 *
 *http://www.howto-blog.de/wordpress-die-letzten-beitraege-anzeigen*
 *******************************************************************/
function get_latest_posts($limit = 3) {
    $latest_posts = get_posts('numberposts=' . $limit);


    foreach($latest_posts as $post) {
    $web_url = get_bloginfo('url');
    $post_title = $post->post_title;
    $post_permalink = get_permalink($post->ID);
    $post_image = get_the_post_thumbnail($post->ID, array(32,32));


    if ( $post_image == '' ) { $post_image = '<img src="' . get_bloginfo("template_directory") . '/images/bk_image_placeholder.png" alt="No Image">'; }


    $output .= '<a href="' . $web_url . '/archiv" title="Artikel: ' . $post_title . '">'  . $post_title . '</a>';
    }


    return $output;
}


add_action('wp_footer', 'my_sidelogin_placeholders');
function my_sidelogin_placeholders() {
    ?>
    <script type="text/javascript">
    jQuery(function() {
        jQuery("#wp_sidebarlogin-2 #user_login").attr('placeholder','Username / email');
        jQuery("#wp_sidebarlogin-2 #user_pass").attr('placeholder','Password');
    });
    </script>
    <?php
}


?>