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checkdnsrr

(PHP 4, PHP 5, PHP 7, PHP 8)

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

Description

checkdnsrr(string $hostname, string $type = "MX"): bool

Searches DNS for records of type type corresponding to hostname.

Parameters

hostname

hostname 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.

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

© 1997–2025 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/function.checkdnsrr.php