function http_request($url,$timeout=30,$header=array()){          if (!function_exists('curl_init')) {              throw new Exception('server not install curl');          }          $ch = curl_init();          curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);          curl_setopt($ch, CURLOPT_HEADER, true);          curl_setopt($ch, CURLOPT_URL, $url);          curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);          if (!emptyempty($header)) {              curl_setopt($ch, CURLOPT_HTTPHEADER, $header);          }          $data = curl_exec($ch);          list($header, $data) = explode("\r\n\r\n", $data);          $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);          if ($http_code == 301 || $http_code == 302) {              $matches = array();              preg_match('/Location:(.*?)\n/', $header, $matches);              $url = trim(array_pop($matches));              curl_setopt($ch, CURLOPT_URL, $url);              curl_setopt($ch, CURLOPT_HEADER, false);              $data = curl_exec($ch);          }          if ($data == false) {              curl_close($ch);          }          @curl_close($ch);          return $data;  }