Estimated reading time

// Estimated reading time

function readTime ( $content = '', $words_per_minute = 250, $with_gutenberg = false ) {

	// In case if content is build with gutenberg parse blocks

	if ( $with_gutenberg ) {

		$blocks = parse_blocks( $content );

		$contentHtml = '';

		foreach ( $blocks as $block ) {

			$contentHtml .= render_block( $block );

		}

		$content = $contentHtml;

	}

	// Remove HTML tags from string

	$content = wp_strip_all_tags( $content );

	// When content is empty return 0

	if ( !$content ) {

		return 0;

	}

	// Count words containing string

	$words_count = str_word_count( $content );

	// Calculate time for read all words and round

	$minutes = ceil( $words_count / $words_per_minute );

	return $minutes . ' min read';

}