View difference between Paste ID: <a href="/8frtsrNJ">8frtsrNJ</a> and <a href="/Lyd65GcC">Lyd65GcC</a>

function zfly9_custom_excerpt( $content ) {
1		function zfly9_custom_excerpt( $content ) {
2	-	if ( ! is_single() ) {
2	+	if ( ! is_singular() ) {
3	-	return substr( $content, 0, 400 ) . ' <a class="more-link" href="' . esc_url( get_permalink() ) . '">Read more!</a>';
3	+	$content = wp_trim_words( $content, 55 ) . ' <a class="more-link" href="' . esc_url( get_permalink() ) . '">Read more!</a>';
4	-	} else {
4	+
5	-	return $content;
5	+
6		return $content;
7		}
8		add_filter( 'the_content', 'zfly9_custom_excerpt' );