checkdnsrr

(PHP 4, PHP 5, PHP 7)

checkdnsrr — Check DNS records corresponding to a given Internet host name or IP address

Description

checkdnsrr ( string $host [, string $type = "MX" ] ) : bool

Searches DNS for records of type type corresponding to host.

Parameters

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.

Return Values

Returns TRUE if any records are found; returns FALSE if no records were found or if an error occurred.

Changelog

Version Description
5.3.0 This function is now available on Windows platforms.
5.2.4 TXT type was added.

Notes

Note:

For compatibility with Windows before this was implemented, then try the » PEAR class » Net_DNS.

See Also

  • 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