Excerpt Image Breite fest, Höhe soll sich entsprechend anpassen

add_filter( 'the_excerpt', 'wpshed_excerpt_thumbnail' );
add_filter('the_excerpt', 'do_shortcode');add_action( 'wp_enqueue_scripts', 'twenty_fifteen_child_right_enqueue_styles');
function twenty_fifteen_child_right_enqueue_styles() {
    wp_enqueue_style( 'parent-style', get_template_directory_uri() . '/style.css' );
}


add_theme_support( 'post-thumbnails' );
add_image_size( 'custom_thumb', 200, 150, true);
set_post_thumbnail_size( 200, 150, true );
function wpshed_excerpt_thumbnail( $excerpt ){
    if( is_single() ) return the_title( sprintf( '<h2 class="entry-title"><a  href="%s" rel="bookmark" style="text-decoration:none !important">', esc_url( get_permalink() ) ), '</a></h2>' ) . $excerpt;
    global $post;
 $img = null;
    if ( has_post_thumbnail() ) {
        $img .= '<a style="width:200px;hight=Auto;margin-left:0px !important" href="'. get_permalink( $post->ID ) .'">'. get_the_post_thumbnail( $post->ID, 'custom_thumb' ) .'</a>';
    } else {
        $img = '';
    }
    return  $img .  $excerpt ;
}


function custom_excerpt_length( $length ) {
 return 35;
}
add_filter( 'excerpt_length', 'custom_excerpt_length', 26 );