Руководство по PHP
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checkdnsrr

(PHP 3, PHP 4 , PHP 5)

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

Description

int checkdnsrr ( string host [, string type])

Searches DNS for records of type type corresponding to host. Returns TRUE if any records are found; returns FALSE if no records were found or if an error occurred.

type may be any one of: A, MX, NS, SOA, PTR, CNAME, AAAA, or ANY. The default is MX.

Host may either be the IP address in dotted-quad notation or the host name.

Замечание: AAAA type added with PHP 5.0.0

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

See also getmxrr(), gethostbyaddr(), gethostbyname(), gethostbynamel(), and the named(8) manual page.

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