public static function highlight_keywords($text, $keyword)
{
$color = Yii::app()->params->color;
$tag_start = "<span style='background-color:" . $color . "'>";
$tag_end = "</span>";
if ($text != '' && $keyword != '') {
$original = $text;
$text = CFunction::vn_str_filter(strtolower($text));
$tagLen = strlen($tag_start) + strlen($tag_end);
$keyword = CFunction::vn_str_filter(strtolower($keyword));
$current = $offset = $delta = 0;
$len = mb_strlen($keyword, "utf-8");
$total = mb_strlen($text, "utf-8");
while (false !== ($pos = strpos($text, $keyword, $offset))) {
$original = mb_substr($original, 0, $pos + $delta, "utf-8") . $tag_start . mb_substr($original, $pos + $delta, $len, "utf-8") . $tag_end . mb_substr($original, $pos + $delta + $len, $total, "utf-8");
$delta += $tagLen;
$offset = $pos + 1;
}
return $original;
} else {
return $text;
}
}
