這篇文章主要介紹了php獲取301跳轉URL簡單實例，有需要的朋友可以參考一下
代碼如下: /** * get_redirect_url() * Gets the address that the provided URL redirects to, * or FALSE if there's no redirect. * * @param string $url * @return string */ function get_redirect_url($url){ $redirect_url = null; $url_parts = @parse_url($url); if (!$url_parts) return false; if (!isset($url_parts['host'])) return false; //can't process relative URLs if (!isset($url_parts['path'])) $url_parts['path'] = '/'; $sock = fsockopen($url_parts['host'], (isset($url_parts['port']) ? (int)$url_parts['port'] : 80), $errno, $errstr, 30); if (!$sock) return false; $request = "HEAD " . $url_parts['path'] . (isset($url_parts['query']) ? '?'.$url_parts['query'] : '') . " HTTP/1.1rn"; $request .= 'Host: ' . $url_parts['host'] . "rn"; $request .= "Connection: Closernrn"; fwrite($sock, $request); $response = ''; while(!feof($sock)) $response .= fread($sock, 8192); fclose($sock); if (preg_match('/^Location: (.+?)$/m', $response, $matches)){ if ( substr($matches[1], 0, 1) == "/" ) return $url_parts['scheme'] . "://" . $url_parts['host'] . trim($matches[1]); else return trim($matches[1]); } else { return false; } } /** * get_all_redirects() * Follows and collects all redirects, in order, for the given URL. * * @param string $url * @return array */ function get_all_redirects($url){ $redirects = array(); while ($newurl = get_redirect_url($url)){ if (in_array($newurl, $redirects)){ break; } $redirects[] = $newurl; $url = $newurl; } return $redirects; } php實現用socket獲取301跳轉地址，可以提取跳轉過程中的url
