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php 获取客户端的ip地址程序代码

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Jun 08, 2016 pm 05:23 PM

httpnbspserver

获取客户端IP地址我们最简单的办法就是直接使用REMOTE_ADDR但这种如果有代理IP就无法获取了，所以我们要使用HTTP_X_FORWARDED_FOR来获取，下面我来给大家介绍一个获取IP地址函数

最简单的做法

代码如下	复制代码
function getRealIpAddr() { if (!emptyempty($_SERVER['HTTP_CLIENT_IP'])) { $ip=$_SERVER['HTTP_CLIENT_IP']; } elseif (!emptyempty($_SERVER['HTTP_X_FORWARDED_FOR'])) //to check ip is pass from proxy { $ip=$_SERVER['HTTP_X_FORWARDED_FOR']; } else { $ip=$_SERVER['REMOTE_ADDR']; } return $ip; }

这个我自己写的

代码如下

复制代码

if(getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), 'unknown')) {
$onlineip = getenv('HTTP_CLIENT_IP');
} elseif(getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), 'unknown')) {
$onlineip = getenv('HTTP_X_FORWARDED_FOR');
} elseif(getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), 'unknown')) {
$onlineip = getenv('REMOTE_ADDR');
} elseif(isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], 'unknown')) {
$onlineip = $_SERVER['REMOTE_ADDR'];
}
echo $onlineip;
?>

但感觉不怎么样，后来百度找到了一个

实例

代码如下

复制代码

function real_ip() {
static $realip = NULL;

if ($realip !== NULL) {
return $realip;
}

if (isset($_SERVER)) {
if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
$arr = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);

   /* 取X-Forwarded-For中第一个非unknown的有效IP字符串 */
   foreach ($arr AS $ip) {
    $ip = trim($ip);

    if ($ip != 'unknown') {
     $realip = $ip;
     break;
    }
   }
  } elseif (isset($_SERVER['HTTP_CLIENT_IP'])) {
   $realip = $_SERVER['HTTP_CLIENT_IP'];
  } else {
   if (isset($_SERVER['REMOTE_ADDR'])) {
    $realip = $_SERVER['REMOTE_ADDR'];
   } else {
    $realip = '0.0.0.0';
   }
  }
} else {
  if (getenv('HTTP_X_FORWARDED_FOR')) {
   $realip = getenv('HTTP_X_FORWARDED_FOR');
  } elseif (getenv('HTTP_CLIENT_IP')) {
   $realip = getenv('HTTP_CLIENT_IP');
  } else {
   $realip = getenv('REMOTE_ADDR');
  }
}

preg_match("/[d.]{7,15}/", $realip, $onlineip);
$realip = !empty($onlineip[0]) ? $onlineip[0] : '0.0.0.0';

return $realip;
}

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