SimplePie::init(): boolean

1513    public function init()1514    {1515        // Check absolute bare minimum requirements.1516        if (!extension_loaded('xml') || !extension_loaded('pcre')) {1517            $this->error = 'XML or PCRE extensions not loaded!';1518            return false;1519        }1520        // Then check the xml extension is sane (i.e., libxml 2.7.x issue on PHP < 5.2.9 and libxml 2.7.0 to 2.7.2 on any version) if we don't have xmlreader.1521        elseif (!extension_loaded('xmlreader')) {1522            static $xml_is_sane = null;1523            if ($xml_is_sane === null) {1524                $parser_check = xml_parser_create();1525                xml_parse_into_struct($parser_check, '<foo>&amp;</foo>', $values);1526                xml_parser_free($parser_check);1527                $xml_is_sane = isset($values[0]['value']);1528            }1529            if (!$xml_is_sane) {1530                return false;1531            }1532        }1533 1534        // The default sanitize class gets set in the constructor, check if it has1535        // changed.1536        if ($this->registry->get_class(Sanitize::class) !== 'SimplePie\Sanitize') {1537            $this->sanitize = $this->registry->create(Sanitize::class);1538        }1539        if (method_exists($this->sanitize, 'set_registry')) {1540            $this->sanitize->set_registry($this->registry);1541        }1542 1543        // Pass whatever was set with config options over to the sanitizer.1544        // Pass the classes in for legacy support; new classes should use the registry instead1545        $this->sanitize->pass_cache_data(1546            $this->enable_cache,1547            $this->cache_location,1548            $this->cache_namefilter,1549            $this->registry->get_class(Cache::class),1550            $this->cache1551        );1552        $this->sanitize->pass_file_data($this->registry->get_class(File::class), $this->timeout, $this->useragent, $this->force_fsockopen, $this->curl_options);1553 1554        if (!empty($this->multifeed_url)) {1555            $i = 0;1556            $success = 0;1557            $this->multifeed_objects = [];1558            $this->error = [];1559            foreach ($this->multifeed_url as $url) {1560                $this->multifeed_objects[$i] = clone $this;1561                $this->multifeed_objects[$i]->set_feed_url($url);1562                $single_success = $this->multifeed_objects[$i]->init();1563                $success |= $single_success;1564                if (!$single_success) {1565                    $this->error[$i] = $this->multifeed_objects[$i]->error();1566                }1567                $i++;1568            }1569            return (bool) $success;1570        } elseif ($this->feed_url === null && $this->raw_data === null) {1571            return false;1572        }1573 1574        $this->error = null;1575        $this->data = [];1576        $this->check_modified = false;1577        $this->multifeed_objects = [];1578        $cache = false;1579 1580        if ($this->feed_url !== null) {1581            $parsed_feed_url = $this->registry->call(Misc::class, 'parse_url', [$this->feed_url]);1582 1583            // Decide whether to enable caching1584            if ($this->enable_cache && $parsed_feed_url['scheme'] !== '') {1585                $cache = $this->get_cache($this->feed_url);1586            }1587 1588            // Fetch the data via \SimplePie\File into $this->raw_data1589            if (($fetched = $this->fetch_data($cache)) === true) {1590                return true;1591            } elseif ($fetched === false) {1592                return false;