(PHP 4, PHP 5, PHP 7)
checkdnsrr — 锟斤拷指锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷IP锟斤拷址锟斤拷DNS通锟脚硷拷锟�
$host
[, string $type = "MX"
] ) : bool
锟斤拷锟捷诧拷同锟斤拷录锟斤拷type锟斤拷锟斤拷锟酵诧拷询锟斤拷锟斤拷锟斤拷host锟斤拷锟斤拷应锟斤拷DNS锟斤拷录锟斤拷
host
锟斤拷锟斤拷锟斤拷host锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷IP锟斤拷址也锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷
type
锟斤拷锟斤拷锟斤拷录锟斤拷锟酵ｏ拷type锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷些锟斤拷锟斤拷锟叫碉拷锟轿猴拷一锟斤拷锟斤拷A锟斤拷MX锟斤拷NS锟斤拷SOA锟斤拷PTR锟斤拷CNAME锟斤拷AAAA锟斤拷A6锟斤拷 SRV锟斤拷NAPTR锟斤拷TXT 锟斤拷锟斤拷 ANY锟斤拷
锟斤拷锟斤拷锟铰硷拷锟斤拷业锟斤拷锟斤拷头锟斤拷锟�TRUE锟斤拷锟斤拷锟斤拷锟斤拷也锟斤拷锟斤拷锟紻NS锟斤拷录锟斤拷锟竭凤拷锟斤拷锟剿达拷锟襟，就凤拷锟斤拷FALSE锟斤拷
| 锟芥本 | 说锟斤拷 |
|---|---|
| 5.3.0 | 锟斤拷锟斤拷锟斤拷锟斤拷锟絎indows平台锟斤拷也锟斤拷锟斤拷使锟斤拷锟剿★拷 |
| 5.2.4 |
锟斤拷锟斤拷锟斤拷TXT锟侥硷拷录锟斤拷锟斤拷锟斤拷
|
| 5.0.0 |
锟斤拷锟斤拷锟斤拷AAAA锟侥硷拷录锟斤拷锟斤拷锟斤拷
|