Posts word count in WordPress admin

wordpress-wordcount.php

<?php

add_action('save_post', function($post_id, $post, $update) {
	$word_count = explode(" ", strip_shortcodes($post->post_content));

	update_post_meta($post_id, '_wordcount', count($word_count));
}, 10, 3);


add_filter('manage_posts_columns', function($columns){
	$columns['wordcount'] = 'Word count';

	return $columns;
});


add_action('manage_posts_custom_column', function($name) {
	global $post;

	$wordcount = get_post_meta($post->ID, '_wordcount', true);
  
	if($wordcount === '') {
  		$wordcount = 'not counted';
	}

	if($name === 'wordcount') {
		echo $wordcount;
	}
});