Allow HTML Formatting in Excerpt (Select Tags)

I really enjoyed customizing this. Check out more from the author of this snippet at the link below.

function wpse_allowedtags() {
// Add custom tags to this string
return '<br>,<em>,<i>,<ul>,<ol>,<li>,<p>'; 
}

if ( ! function_exists( 'wpse_custom_wp_trim_excerpt' ) ) :

function wpse_custom_wp_trim_excerpt($wpse_excerpt) {
$raw_excerpt = $wpse_excerpt;
if ( '' == $wpse_excerpt ) {

$wpse_excerpt = get_the_content('');
$wpse_excerpt = strip_shortcodes( $wpse_excerpt );
$wpse_excerpt = apply_filters('the_content', $wpse_excerpt);
$wpse_excerpt = str_replace(']]>', ']]>', $wpse_excerpt);
$wpse_excerpt = strip_tags($wpse_excerpt, wpse_allowedtags()); /*IF you need to allow just certain tags. Delete if all tags are allowed */

//Set the excerpt word count and only break after sentence is complete.
$excerpt_word_count = 15;
$excerpt_length = apply_filters('excerpt_length', $excerpt_word_count); 
$tokens = array();
$excerptOutput = '';
$count = 0;

// Divide the string into tokens; HTML tags, or words, followed by any whitespace
preg_match_all('/(<[^>]+>|[^<>\s]+)\s*/u', $wpse_excerpt, $tokens);

foreach ($tokens[0] as $token) {

if ($count >= $excerpt_length && preg_match('/[\,\;\?\.\!]\s*$/uS', $token)) { 
// Limit reached, continue until , ; ? . or ! occur at the end
$excerptOutput .= trim($token);
break;
}

// Add words to complete sentence
$count++;

// Append what's left of the token
$excerptOutput .= $token;
}

$wpse_excerpt = trim(force_balance_tags($excerptOutput));

$excerpt_end = '...'; 
$excerpt_more = apply_filters('excerpt_more', ' ' . $excerpt_end);

$pos = strrpos($wpse_excerpt, '</');
if ($pos !== false)
// Inside last HTML tag
$wpse_excerpt = substr_replace($wpse_excerpt, $excerpt_end, $pos, 0); /* Add read more next to last word */
else
// After the content
$wpse_excerpt .= $excerpt_more; /*Add read more in new paragraph */

return $wpse_excerpt;

}
return apply_filters('wpse_custom_wp_trim_excerpt', $wpse_excerpt, $raw_excerpt);
}

endif;

remove_filter('get_the_excerpt', 'wp_trim_excerpt');
add_filter('get_the_excerpt', 'wpse_custom_wp_trim_excerpt');

Source.

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I’m an African / Ojibwe First Nations Web Developer living in Winnipeg, Manitoba.

Visit the Tips and Blog to see what I’m working on.