Code thời gian đọc ước tính

/**
 *
 * Post estimated reading time shortcode
 *
 */
function bnix_reading_time_shortcode() {
	$content = get_post_field( 'post_content', $post->ID );
	$word_count = str_word_count( strip_tags( $content ) );
	$readingtime = ceil($word_count / 200);
	$totalreadingtime = '<div class="reading-time">Thời gian đọc: '.$readingtime . ' phút</div>';
	return $totalreadingtime;
}
add_shortcode('readingshortcode', 'bnix_reading_time_shortcode');

/**
 *
 * Post estimated reading time shortcode
 *
 */
function bnix_reading_time_shortcode($content) {
	$word_count = str_word_count( strip_tags( $content ) );
	$readingtime = ceil($word_count / 200);
	$totalreadingtime = '<div class="reading-time">Thời gian đọc: '.$readingtime . ' phút</div>';
	return $totalreadingtime.$content;
}
add_filter('the_content', 'bnix_reading_time_shortcode',20);