checkdnsrr

(PHP 4, PHP 5)

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

int checkdnsrr ( string $host [, string $type ] )

Searches DNS for records of type type corresponding to host .

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. The default is MX.

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

版本	说明
5.2.4	TXT `type` was added.
5.0.0	AAAA `type` was added.

Note: This function is not implemented on Windows platforms. Try the » PEAR class » Net_DNS.