Network Functions
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Network Functions
PHP Manual

# checkdnsrr

(PHP 4, PHP 5)

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

### Description

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

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.
5.0.0 | AAAA `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

Network Functions
closelog
Network Functions
PHP Manual