Display Any ACF Field With a Safe Shortcode

add_shortcode( 'field_value', function ( $atts ) {
    $atts    = shortcode_atts( array( 'name' => '', 'post_id' => 0, 'size' => 'medium', 'sep' => ', ' ), $atts, 'field_value' );
    $name    = sanitize_key( $atts['name'] );
    $post_id = $atts['post_id'] ? absint( $atts['post_id'] ) : get_the_ID();

    if ( '' === $name || ! $post_id || ! function_exists( 'get_field' ) || ! is_post_publicly_viewable( $post_id ) ) {
        return '';
    }

    $value = get_field( $name, $post_id );

    $render = function ( $v ) use ( $atts, &$render ) {
        if ( $v instanceof WP_Post ) {
            return '<a href="' . esc_url( get_permalink( $v ) ) . '">' . esc_html( get_the_title( $v ) ) . '</a>';
        }

        if ( $v instanceof WP_Term ) {
            return '<a href="' . esc_url( get_term_link( $v ) ) . '">' . esc_html( $v->name ) . '</a>';
        }

        if ( is_array( $v ) ) {
            if ( isset( $v['ID'], $v['url'] ) && isset( $v['mime_type'] ) && 0 === strpos( $v['mime_type'], 'image/' ) ) {
                return wp_get_attachment_image( (int) $v['ID'], sanitize_key( $atts['size'] ) );
            }

            if ( isset( $v['url'], $v['title'] ) ) {
                $target = ! empty( $v['target'] ) ? ' target="_blank" rel="noopener"' : '';

                return '<a href="' . esc_url( $v['url'] ) . '"' . $target . '>' . esc_html( $v['title'] ? $v['title'] : $v['url'] ) . '</a>';
            }

            if ( isset( $v['label'] ) ) {
                return esc_html( $v['label'] );
            }

            return implode( esc_html( $atts['sep'] ), array_map( $render, $v ) );
        }

        if ( is_bool( $v ) ) {
            return $v ? 'Yes' : 'No';
        }

        return esc_html( (string) $v );
    };

    return null === $value || '' === $value || false === $value ? '' : '<span class="field-' . esc_attr( $name ) . '">' . $render( $value ) . '</span>';
} );