Helper\Payment\alipay\simple_html_dom::parse_charset PHP Метод

    protected function parse_charset()
    {
        global $debugObject;
        $charset = null;
        if (function_exists('get_last_retrieve_url_contents_content_type')) {
            $contentTypeHeader = get_last_retrieve_url_contents_content_type();
            $success = preg_match('/charset=(.+)/', $contentTypeHeader, $matches);
            if ($success) {
                $charset = $matches[1];
                if (is_object($debugObject)) {
                    $debugObject->debugLog(2, 'header content-type found charset of: ' . $charset);
                }
            }
        }
        if (empty($charset)) {
            $el = $this->root->find('meta[http-equiv=Content-Type]', 0);
            if (!empty($el)) {
                $fullvalue = $el->content;
                if (is_object($debugObject)) {
                    $debugObject->debugLog(2, 'meta content-type tag found' . $fullvalue);
                }
                if (!empty($fullvalue)) {
                    $success = preg_match('/charset=(.+)/', $fullvalue, $matches);
                    if ($success) {
                        $charset = $matches[1];
                    } else {
                        // If there is a meta tag, and they don't specify the character set, research says that it's typically ISO-8859-1
                        if (is_object($debugObject)) {
                            $debugObject->debugLog(2, 'meta content-type tag couldn\'t be parsed. using iso-8859 default.');
                        }
                        $charset = 'ISO-8859-1';
                    }
                }
            }
        }
        // If we couldn't find a charset above, then lets try to detect one based on the text we got...
        if (empty($charset)) {
            // Have php try to detect the encoding from the text given to us.
            $charset = mb_detect_encoding($this->root->plaintext . "ascii", $encoding_list = array("UTF-8", "CP1252"));
            if (is_object($debugObject)) {
                $debugObject->debugLog(2, 'mb_detect found: ' . $charset);
            }
            // and if this doesn't work...  then we need to just wrongheadedly assume it's UTF-8 so that we can move on - cause this will usually give us most of what we need...
            if ($charset === false) {
                if (is_object($debugObject)) {
                    $debugObject->debugLog(2, 'since mb_detect failed - using default of utf-8');
                }
                $charset = 'UTF-8';
            }
        }
        // Since CP1252 is a superset, if we get one of it's subsets, we want it instead.
        if (strtolower($charset) == strtolower('ISO-8859-1') || strtolower($charset) == strtolower('Latin1') || strtolower($charset) == strtolower('Latin-1')) {
            if (is_object($debugObject)) {
                $debugObject->debugLog(2, 'replacing ' . $charset . ' with CP1252 as its a superset');
            }
            $charset = 'CP1252';
        }
        if (is_object($debugObject)) {
            $debugObject->debugLog(1, 'EXIT - ' . $charset);
        }
        return $this->_charset = $charset;
    }