php获取本机ip地址 php获取远程IP地址

//  
echo $_SERVER['REMOTE_ADDR']; 
 
//本机IP地址
function get_local_ip() { 
    $preg = "/A((([0-9]?[0-9])|(1[0-9]{2})|(2[0-4][0-9])|(25[0-5])).){3}(([0-9]?[0-9])|(1[0-9]{2})|(2[0-4][0-9])|(25[0-5]))Z/"; 
//获取操作系统为win2000/xp、win7的本机IP真实地址 
    exec("ipconfig", $out, $stats); 
    if (!emptyempty($out)) { 
        foreach ($out AS $row) { 
            if (strstr($row, "IP") && strstr($row, ":") && !strstr($row, "IPv6")) { 
                $tmpIp = explode(":", $row); 
                if (preg_match($preg, trim($tmpIp[1]))) { 
                    return trim($tmpIp[1]); 
                } 
            } 
        } 
    } 
//获取操作系统为linux类型的本机IP真实地址 
    exec("ifconfig", $out, $stats); 
    if (!emptyempty($out)) { 
        if (isset($out[1]) && strstr($out[1], 'addr:')) { 
            $tmpArray = explode(":", $out[1]); 
            $tmpIp = explode(" ", $tmpArray[1]); 
            if (preg_match($preg, trim($tmpIp[0]))) { 
                return trim($tmpIp[0]); 
            } 
        } 
    } 
    return '127.0.0.1'; 
}