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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