public static function highlight($text, $match, &$n = null)
{
$n = 0;
if ($match === null || $match === false || $match === "" || $text == "") {
return htmlspecialchars($text);
}
$mtext = $text;
$offsetmap = null;
$flags = "";
if (is_object($match)) {
if (!isset($match->preg_raw)) {
$match = $match->preg_utf8;
$flags = "u";
} else {
if (preg_match('/[\\x80-\\xFF]/', $text)) {
list($mtext, $offsetmap) = UnicodeHelper::deaccent_offsets($mtext);
$match = $match->preg_utf8;
$flags = "u";
} else {
$match = $match->preg_raw;
}
}
}
$s = $clean_initial_nonletter = false;
if ($match !== null && $match !== "") {
if (str_starts_with($match, self::UTF8_INITIAL_NONLETTER)) {
$clean_initial_nonletter = true;
}
if ($match[0] !== "{") {
$match = "{(" . $match . ")}is" . $flags;
}
$s = preg_split($match, $mtext, -1, PREG_SPLIT_DELIM_CAPTURE);
}
if (!$s || count($s) == 1) {
return htmlspecialchars($text);
}
$n = (int) (count($s) / 2);
if ($offsetmap) {
for ($i = $b = $o = 0; $i < count($s); ++$i) {
if ($s[$i] !== "") {
$o += strlen($s[$i]);
$e = UnicodeHelper::deaccent_translate_offset($offsetmap, $o);
$s[$i] = substr($text, $b, $e - $b);
$b = $e;
}
}
}
if ($clean_initial_nonletter) {
for ($i = 1; $i < count($s); $i += 2) {
if ($s[$i] !== "" && preg_match('{\\A((?!\\pL|\\pN)\\X)(.*)\\z}us', $s[$i], $m)) {
$s[$i - 1] .= $m[1];
$s[$i] = $m[2];
}
}
}
for ($i = 0; $i < count($s); ++$i) {
if ($i % 2 && $s[$i] !== "") {
$s[$i] = '<span class="match">' . htmlspecialchars($s[$i]) . "</span>";
} else {
$s[$i] = htmlspecialchars($s[$i]);
}
}
return join("", $s);
}
