PHP获取IP客户端地址 并验证IP地址正确性

 

 

/**

• 取得IP
  
• @return string 字符串类型的返回结果
  */
  function getIp(){
  if (@$_SERVER[‘HTTP_CLIENT_IP’] && $_SERVER[‘HTTP_CLIENT_IP’]!=’unknown’) {
  $ip = $_SERVER[‘HTTP_CLIENT_IP’];
  } elseif (@$_SERVER[‘HTTP_X_FORWARDED_FOR’] && $_SERVER[‘HTTP_X_FORWARDED_FOR’]!=’unknown’) {
  $ip = $_SERVER[‘HTTP_X_FORWARDED_FOR’];
  } else {
  $ip = $_SERVER[‘REMOTE_ADDR’];
  }
  return preg_match(‘/^\d[\d.]+\d$/‘, $ip) ? $ip : ‘’;
  }