/**
* Static method to crawl the URLs
*
* @param string $url
* @param array $elements
* @param string $parent
* @param string $start
* @param string $time
* @return void
*/
public static function crawl($url, $elements = null, $parent = null, $start = null, $time = null)
{
// Encode the URL
$url = str_replace(array('%3A', '%2F', '%23', '%3F', '%3D', '%25', '%2B'), array(':', '/', '#', '?', '=', '%', '+'), rawurlencode($url));
$slashes = substr_count($url, '/') - 2;
if ($slashes > self::$depth) {
self::$depth = $slashes;
}
if (!array_key_exists($url, self::$urls) && !array_key_exists(strtolower($url), self::$urls)) {
$spider = new Spider($url, $elements);
echo '-> (' . $spider->getCode() . ') ' . $url . PHP_EOL;
if ($spider->isError()) {
self::$errors[] = array('code' => $spider->getCode(), 'url' => $url, 'parent' => $parent);
} else {
self::$urls[$url] = $spider;
$domain = str_replace(self::$urls[$url]->getSchema(), '', self::$urls[$url]->getBase());
if (strpos($domain, '/') !== false) {
$domain = substr($domain, 0, strpos($domain, '/'));
}
$urls = self::$urls[$url]->getElements('a');
if (null !== $urls) {
foreach ($urls as $u) {
$expired = false;
if (null !== $start && null !== $time) {
$expired = time() - $start > $time;
}
if (!$expired && null !== $u['href'] && $u['href'] != '' && substr($u['href'], 0, 1) != '#' && substr($u['href'], 0, 1) != '?' && stripos($u['href'], $domain) !== false) {
self::crawl($u['href'], $elements, $url, $start, $time);
}
}
}
}
}
}