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checkdnsrr

(PHP 4, PHP 5)

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

说明

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

Searches DNS for records of type type corresponding to host .

参数

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.

返回值

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

更新日志

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

注释

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