Set a Minimum Word Count for Posts

/**

 * Prevent publishing posts under a minimum number of words.

 *

 * @param int     $post_id The id of the post.

 * @param WP_Post $post The post object.

 *

 * @return void

 */

function wpcode_snippet_publish_min_words( $post_id, $post ) {

	// Edit the line below to set the desired minimum number of words.

	$word_count = 100;

	if ( str_word_count( $post->post_content ) < $word_count ) {

		wp_die(

			sprintf(

				// Translators: placeholder adds the minimum number of words.

				esc_html__( 'The post content is below the minimum word count. Your post needs to have at least %d words to be published.' ),

				absint( $word_count )

			)

		);

	}

}

add_action( 'publish_post', 'wpcode_snippet_publish_min_words', 9, 2 );