php 通过ip获取国家和城市

	function getLocationInfoByIp(){
		$client  = @$_SERVER['HTTP_CLIENT_IP'];
		$forward = @$_SERVER['HTTP_X_FORWARDED_FOR'];
		$remote  = @$_SERVER['REMOTE_ADDR'];
		$result  = array('country'=>'', 'city'=>'');
		if(filter_var($client, FILTER_VALIDATE_IP)){
			$ip = $client;
		}elseif(filter_var($forward, FILTER_VALIDATE_IP)){
			$ip = $forward;
		}else{
			$ip = $remote;
		}
		$ip_data = @json_decode
	(file_get_contents("http://www.geoplugin.net/json.gp?ip=".$ip));    
		if($ip_data && $ip_data->geoplugin_countryName != null){
			$result['country'] = $ip_data->geoplugin_countryCode;
			$result['country_name'] = $ip_data->geoplugin_countryName;
			$result['city'] = $ip_data->geoplugin_city;
		}
		return $ip.'|'.$result['country_name'].'--'.$result['city'];
	}