“排除当前帖子”Widget wordpress（PHP帮助）

Hi :) I am working on my site with the "flexible post widget" to show the related contents or the content that I am interested in showing on the sidebar.

The widget works very well and I'm interested in continuing to use it, especially for the design and adaptability options with my site.

The problem? It does not include a function for "exclude the current post".

I was reviewing the code (I add it to this thread) and I think I could add some lines of code for this function (exclude the post I'm reading).

Unfortunately I'm new to programming and I'm lost with what and where to add it.

Could you help me?

<?php
/**
 * Flexible Posts Widget: Default widget template
 * 
 * @since 3.4.0
 *
 * This template was added to overcome some often-requested changes
 * to the old default template (widget.php).
 */

// Block direct requests
if ( !defined('ABSPATH') )
    die('-1');

echo $before_widget;

if ( ! empty( $title ) )
    echo $before_title . $title . $after_title;

if ( $flexible_posts->have_posts() ):

function be_exclude_current_post( $args ) {
        if( is_singular() && !isset( $args['post__in'] ) )
            $args['post__not_in'] = array( get_the_ID() );
        return $args;
    }
    add_filter( 'widget_posts_args', 'be_exclude_current_post' );

?>
    <ul class="dpe-flexible-posts">
    <?php while ( $flexible_posts->have_posts() ) : $flexible_posts->the_post(); global $post; ?>
        <li id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
            <a href="<?php echo the_permalink(); ?>">
                <?php
                    if ( $thumbnail == true ) {
                        // If the post has a feature image, show it
                        if ( has_post_thumbnail() ) {
                            the_post_thumbnail( $thumbsize );
                        // Else if the post has a mime type that starts with "image/" then show the image directly.
                        } elseif ( 'image/' == substr( $post->post_mime_type, 0, 6 ) ) {
                            echo wp_get_attachment_image( $post->ID, $thumbsize );
                        }
                    }
                ?>
                <div class="title"><?php the_title(); ?></div>
            </a>
        </li>
<hr>
    <?php endwhile; ?>
    </ul><!-- .dpe-flexible-posts -->
<?php   
endif; // End have_posts()

echo $after_widget;

Add this to your theme's 'functions.php' and remove it from the widget template.

function be_exclude_current_post( $args ) {
    if( is_singular() && !isset( $args['post__in'] ) )
        $args['post__not_in'] = array( get_the_ID() );
    return $args;
}
add_filter( 'dpe_fpw_args', 'be_exclude_current_post' );