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

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