excerpt.php

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<?php
$text = (string) elgg_extract('text', $vars);
$text = elgg_strip_tags($text);
$text = str_replace('&nbsp;', ' ', $text);
$text = preg_replace('/ +/', ' ', $text);
$text = trim($text);
 
$suffix = elgg_extract('suffix', $vars, '...');
 
$string_length = elgg_strlen($text);
$num_chars = (int) elgg_extract('num_chars', $vars, 250);
 
if ($string_length <= $num_chars) {
    echo $text;
    return;
}
 
// handle cases
$excerpt = elgg_substr($text, 0, $num_chars);
$space = elgg_strrpos($excerpt, ' ', 0);
 
// don't crop if can't find a space.
if ($space === false) {
    $space = $num_chars;
}
 
$excerpt = trim(elgg_substr($excerpt, 0, $space));
 
if ($string_length != elgg_strlen($excerpt)) {
    $excerpt .= $suffix;
}
 
echo $excerpt;