public static function truncate($text, $length = 0, $noSplit = true, $allowHtml = true)
{
// Check if HTML tags are allowed.
if (!$allowHtml) {
// Deal with spacing issues in the input.
$text = str_replace('>', '> ', $text);
$text = str_replace(array(' ', ' '), ' ', $text);
$text = MString::trim(preg_replace('#\\s+#mui', ' ', $text));
// Strip the tags from the input and decode entities.
$text = strip_tags($text);
$text = html_entity_decode($text, ENT_QUOTES, 'UTF-8');
// Remove remaining extra spaces.
$text = str_replace(' ', ' ', $text);
$text = MString::trim(preg_replace('#\\s+#mui', ' ', $text));
}
// Truncate the item text if it is too long.
if ($length > 0 && MString::strlen($text) > $length) {
// Find the first space within the allowed length.
$tmp = MString::substr($text, 0, $length);
if ($noSplit) {
$offset = MString::strrpos($tmp, ' ');
if (MString::strrpos($tmp, '<') > MString::strrpos($tmp, '>')) {
$offset = MString::strrpos($tmp, '<');
}
$tmp = MString::substr($tmp, 0, $offset);
// If we don't have 3 characters of room, go to the second space within the limit.
if (MString::strlen($tmp) > $length - 3) {
$tmp = MString::substr($tmp, 0, MString::strrpos($tmp, ' '));
}
}
if ($allowHtml) {
// Put all opened tags into an array
preg_match_all("#<([a-z][a-z0-9]*)\\b.*?(?!/)>#i", $tmp, $result);
$openedTags = $result[1];
$openedTags = array_diff($openedTags, array("img", "hr", "br"));
$openedTags = array_values($openedTags);
// Put all closed tags into an array
preg_match_all("#</([a-z]+)>#iU", $tmp, $result);
$closedTags = $result[1];
$numOpened = count($openedTags);
// All tags are closed
if (count($closedTags) == $numOpened) {
return $tmp . '...';
}
$openedTags = array_reverse($openedTags);
// Close tags
for ($i = 0; $i < $numOpened; $i++) {
if (!in_array($openedTags[$i], $closedTags)) {
$tmp .= "</" . $openedTags[$i] . ">";
} else {
unset($closedTags[array_search($openedTags[$i], $closedTags)]);
}
}
}
$text = $tmp . '...';
}
return $text;
}