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Custom excerpt options for Wordpress.
<?php
/**
* A replacement for the default wp_trim_excerpt().
*
* Generates an excerpt from the_content, if needed.
*
* It is similar (identical) to the default to allow filters other than our own to work,
* with the exception that it uses our default my_trim_words() function.
*
* @param string $text Optional. The excerpt. If set to empty, an excerpt is generated.
* @return string The excerpt.
*/
function my_trim_excerpt($text = '') {
$raw_excerpt = $text;
if ( '' == $text ) {
$text = get_the_content('');
$text = strip_shortcodes( $text );
$text = apply_filters( 'the_content', $text );
$text = str_replace(']]>', ']]&gt;', $text);
$excerpt_length = apply_filters( 'excerpt_length', 55 );
$excerpt_more = apply_filters( 'excerpt_more', ' ' . '[&hellip;]' );
// Use our own version of wp_trim_words().
$text = my_trim_words( $text, $excerpt_length, $excerpt_more );
}
return apply_filters( 'wp_trim_excerpt', $text, $raw_excerpt );
}
/**
* A replacement for the default wp_trim_words().
*
* Trims text to a certain number of words.
*
* It is similar (identical) to the default to allow filters other than our own to work,
* with the exception that it lets certain allowed HTML to pass through.
*
* @param string $text Text to trim.
* @param int $num_words Number of words. Default 55.
* @param string $more Optional. What to append if $text needs to be trimmed. Default '&hellip;'.
* @return string Trimmed text.
*/
function my_trim_words( $text, $num_words = 55, $more = null ) {
if ( null === $more )
$more = __( '&hellip;' );
$original_text = $text;
// Allowed HTML tags
$allowed_tags = '<p>,<a>,<em>,<strong>,<img>,<ul>,<li>';
$text = strip_tags($text, $allowed_tags);
/* translators: If your word count is based on single characters (East Asian characters),
enter 'characters'. Otherwise, enter 'words'. Do not translate into your own language. */
if ( 'characters' == _x( 'words', 'word count: words or characters?' ) && preg_match( '/^utf\-?8$/i', get_option( 'blog_charset' ) ) ) {
$text = trim( preg_replace( "/[\n\r\t ]+/", ' ', $text ), ' ' );
preg_match_all( '/./u', $text, $words_array );
$words_array = array_slice( $words_array[0], 0, $num_words + 1 );
$sep = '';
} else {
$words_array = preg_split( "/[\n\r\t ]+/", $text, $num_words + 1, PREG_SPLIT_NO_EMPTY );
$sep = ' ';
}
if ( count( $words_array ) > $num_words ) {
array_pop( $words_array );
$text = implode( $sep, $words_array );
$text = $text . $more;
} else {
$text = implode( $sep, $words_array );
}
return apply_filters( 'wp_trim_words', $text, $num_words, $more, $original_text );
}
/**
* Remove the default trimming filter and replace it with our own.
*/
remove_filter( 'get_the_excerpt', 'wp_trim_excerpt' );
add_filter( 'get_the_excerpt', 'my_trim_excerpt' );
/**
* Custom excerpt length.
*/
function my_excerpt_length() {
return 100;
}
add_filter( 'excerpt_length', 'my_excerpt_length' );
/**
* Custom excerpt more...
*/
function my_excerpt_more() {
return " <strong>[...]</strong>";
}
add_filter( 'excerpt_more', 'my_excerpt_more' );
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