test.php

<?php

function baca_lagi($atts){

    //global $post;

    $output = '';

    extract( shortcode_atts( array(
        'ids' => null,
    ), $atts ) );

    $id_array = explode(',', $ids);
    $id_implode = implode(',',$id_array);
    
    $args = array(
    	'post_type' => 'post',
    	'include'   => $id_implode,
        'orderby' => 'post__in',
    );
    
    $post = get_posts( $args );

    if ( !empty( $post ) ) {
	    foreach ( $post as $posts ) {
		    $output .= '<a href="'. post_permalink( $posts->ID ) .'" class="bacajuga" target="_blank"><span class="bacaimg">'.get_the_post_thumbnail( $posts->ID, array( 100, 50) ).'</span><span class="bacajudul"><span class="bacablack">Baca juga:</span> '. $posts->post_title .'</span></a>';
		}		
	}

	//wp_reset_postdata();

    return $output; 
}

add_shortcode('bacalagi','baca_lagi');

?>