(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.
host may either be the IP address in dotted-quad notation or the host name.
type may be any one of: A, MX, NS, SOA, PTR, CNAME, AAAA, A6, SRV, NAPTR, TXT or ANY.
Returns TRUE if any records are found; returns FALSE if no records were found or if an error occurred.
|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.|
- 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