checkdnsrr
(PHP 4, PHP 5)
checkdnsrr — Check DNS records corresponding to a given Internet host name or IP address
说明
bool checkdnsrr ( string $host [, string $type = "MX" ] )Searches DNS for records of type type corresponding to host.
参数
- host
-
host may either be the IP address in dotted-quad notation or the host name.
- type
-
type may be any one of: A, MX, NS, SOA, PTR, CNAME, AAAA, A6, SRV, NAPTR, TXT or ANY.
返回值
Returns TRUE if any records are found; returns FALSE if no records were found or if an error occurred.
更新日志
| 版本 | 说明 |
|---|---|
| 5.3.0 | This function is now available on Windows platforms. |
| 5.2.4 | TXT type was added. |
| 5.0.0 | AAAA type was added. |
注释
Note:
For compatibility with Windows before this was implemented, then try the » PEAR class » Net_DNS.
参见
- dns_get_record() - Fetch DNS Resource Records associated with a hostname
- getmxrr() - Get MX records corresponding to a given Internet host name
- gethostbyaddr() - Get the Internet host name corresponding to a given IP address
- gethostbyname() - Get the IPv4 address corresponding to a given Internet host name
- gethostbynamel() - Get a list of IPv4 addresses corresponding to a given Internet host name
- the named(8) manual page
