NukeViet\Core\Request::filterTags PHP Метод

    private function filterTags($source)
    {
        $source = preg_replace('/\\<script([^\\>]*)\\>(.*)\\<\\/script\\>/isU', '', $source);
        if (in_array('iframe', $this->disabletags)) {
            if (preg_match_all("/<iframe[a-z0-9\\s\\=\"]*src\\=\"(http(s)?\\:)?\\/\\/([w]{3})?\\.youtube[^\\/]+\\/embed\\/([^\\?]+)(\\?[^\"]+)?\"[^\\>]*\\><\\/iframe>/isU", $source, $match)) {
                foreach ($match[0] as $key => $_m) {
                    $vid = $match[4][$key];
                    $width = intval(preg_replace("/^(.*)width\\=\"([\\d]+)\"(.*)\$/isU", "\\2", $_m));
                    $height = intval(preg_replace("/^(.*)height\\=\"([\\d]+)\"(.*)\$/isU", "\\2", $_m));
                    $width = $width > 0 ? $width : 480;
                    $height = $height > 0 ? $height : 360;
                    $ojwplayer = '<object height="' . $height . '" width="' . $width . '"><param name="movie" value="//www.youtube.com/v/' . $vid . '?rel=0&amp;hl=pt_BR&amp;version=3" /><param name="allowFullScreen" value="true" /><param name="allowscriptaccess" value="always" /><embed allowfullscreen="true" allowscriptaccess="always" height="' . $height . '" src="//www.youtube.com/v/' . $vid . '?rel=0&amp;autoplay=1&amp;hl=pt_BR&amp;version=3" type="application/x-shockwave-flash" width="' . $width . '"></embed></object>';
                    $source = str_replace($_m, $ojwplayer, $source);
                }
            }
        }
        $preTag = null;
        $postTag = $source;
        $tagOpen_start = strpos($source, '<');
        while ($tagOpen_start !== false) {
            $preTag .= substr($postTag, 0, $tagOpen_start);
            $postTag = substr($postTag, $tagOpen_start);
            $fromTagOpen = substr($postTag, 1);
            $tagOpen_end = strpos($fromTagOpen, '>');
            if ($tagOpen_end === false) {
                break;
            }
            $tagOpen_nested = strpos($fromTagOpen, '<');
            if ($tagOpen_nested !== false && $tagOpen_nested < $tagOpen_end) {
                $preTag .= substr($postTag, 0, $tagOpen_nested + 1);
                $postTag = substr($postTag, $tagOpen_nested + 1);
                $tagOpen_start = strpos($postTag, '<');
                continue;
            }
            $tagOpen_nested = strpos($fromTagOpen, '<') + $tagOpen_start + 1;
            $currentTag = substr($fromTagOpen, 0, $tagOpen_end);
            $tagLength = strlen($currentTag);
            if (!$tagOpen_end) {
                $preTag .= $postTag;
                $tagOpen_start = strpos($postTag, '<');
            }
            $tagLeft = $currentTag;
            $attrSet = array();
            $currentSpace = strpos($tagLeft, ' ');
            if (substr($currentTag, 0, 1) == '/') {
                $isCloseTag = true;
                list($tagName) = explode(' ', $currentTag);
                $tagName = strtolower(substr($tagName, 1));
            } else {
                $isCloseTag = false;
                list($tagName) = explode(' ', $currentTag);
                $tagName = strtolower($tagName);
            }
            if (!preg_match('/^[a-z][a-z0-9]*$/i', $tagName) || in_array($tagName, $this->disabletags)) {
                $postTag = substr($postTag, $tagLength + 2);
                $tagOpen_start = strpos($postTag, '<');
                continue;
            }
            while ($currentSpace !== false) {
                $fromSpace = substr($tagLeft, $currentSpace + 1);
                $nextSpace = strpos($fromSpace, ' ');
                $openQuotes = strpos($fromSpace, '"');
                $closeQuotes = strpos(substr($fromSpace, $openQuotes + 1), '"') + $openQuotes + 1;
                if (strpos($fromSpace, '=') !== false) {
                    if ($openQuotes !== false && strpos(substr($fromSpace, $openQuotes + 1), '"') !== false) {
                        $attr = substr($fromSpace, 0, $closeQuotes + 1);
                    } else {
                        $attr = substr($fromSpace, 0, $nextSpace);
                    }
                } else {
                    $attr = substr($fromSpace, 0, $nextSpace);
                }
                if (!$attr) {
                    $attr = $fromSpace;
                }
                $attrSet[] = $attr;
                $tagLeft = substr($fromSpace, strlen($attr));
                $currentSpace = strpos($tagLeft, ' ');
            }
            if (!$isCloseTag) {
                $preTag .= '{@[' . $tagName;
                if (!empty($attrSet)) {
                    $attrSet = $this->filterAttr($attrSet);
                    $preTag .= ' ' . implode(' ', $attrSet);
                }
                $preTag .= strpos($fromTagOpen, '</' . $tagName) ? ']@}' : ' /]@}';
            } else {
                $preTag .= '{@[/' . $tagName . ']@}';
            }
            $postTag = substr($postTag, $tagLength + 2);
            $tagOpen_start = strpos($postTag, '<');
        }
        $preTag .= $postTag;
        $preTag = str_replace(array("'", '"', '<', '>'), array("&#039;", "&quot;", "&lt;", "&gt;"), $preTag);
        return trim(str_replace(array("[@{", "}@]", "{@[", "]@}"), array('"', '"', "<", '>'), $preTag));
    }