关于域名CNAME后服务器能否获得原址？

<code class="lang-php"><?php var_dump(dns_get_record('www.baidu.com', DNS_A));
// returns
array(2) {
  [0]=>
  array(5) {
    ["host"]=>
    string(16) "www.a.shifen.com"
    ["class"]=>
    string(2) "IN"
    ["ttl"]=>
    int(267)
    ["type"]=>
    string(1) "A"
    ["ip"]=>
    string(14) "61.135.169.105"
  }
  [1]=>
  array(5) {
    ["host"]=>
    string(16) "www.a.shifen.com"
    ["class"]=>
    string(2) "IN"
    ["ttl"]=>
    int(267)
    ["type"]=>
    string(1) "A"
    ["ip"]=>
    string(14) "61.135.169.125"
  }
}
</code>