Add Tag from Article to Meta Tag

/* Add Tag from Article to Meta Tag */
function add_tag_from_article() {
    if ( is_singular() && is_single() ) {
        global $post;
        $tags=get_the_tags( $post->ID );
        foreach ( $tags as $tag ) {
            ?>
            <meta content="<?php echo $tag->name ?>" property="og:tag" />
            <?php
        }
    }
}

add_action( 'wp_head', 'add_tag_from_article' );