Question

php exec函数，在局域网内：1.HTTP_CLIENT_IP能得到客户端的ip不？ 2.下面语句怎样修改能得到显示mac地址

$macaddress=exec ("arp -a | find /i".' "'.$ip.'"');
$MacName=(preg_split("/\s+/", trim($macaddress)));
echo " --- "."IP ".$ip."<br /> --- "."MAC "."$MacName";

Answer 1

我记得MAC地址是无法获取到的，可能你只能获取本机服务器的MAC，单独的这样获取Ip可能有时获取不到，
/**
* 获取客户端IP地址
*/
function clientIp(){
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'];
}
preg_match("/[\d\.]{7,15}/", $onlineip, $onlineipmatches);
$onlineip = $onlineipmatches[0] ? $onlineipmatches[0] : 'unknown';
unset($onlineipmatches);
return $onlineip;
}