Excerpt customisation

extras.php

/*
 * Let's customize our excerpt a bit, so it looks better
 * First we decrease the default excerpt length, then
 * we give it a proper hellip for the more text.
 */
function themeslug_custom_excerpt_length( $length ) {
	return 27;
}
add_filter( 'excerpt_length', 'themeslug_custom_excerpt_length', 999 );

function themeslug_custom_excerpt_more($more) {
	$more_link = '<span class="read-more">';
	$more_link .= '<a class="more-link" href="' . esc_url( get_the_permalink() ) . '" rel="bookmark">';
	$more_link .= sprintf(
		wp_kses( __( 'Read more %s', 'themeslug' ), array( 'span' => array( 'class' => array() ) ) ),
		the_title( '<span class="screen-reader-text">"', '"</span>', false )
	);
	$more_link .= '</a></span>';
	return '&hellip; ' . $more_link;
}
add_filter( 'excerpt_more', 'themeslug_custom_excerpt_more' );