getmxrr

(PHP 4, PHP 5)

getmxrr — Get MX records corresponding to a given Internet host name

说明

bool getmxrr ( string $hostname , array &$mxhosts [, array &$weight ] )

Searches DNS for MX records corresponding to hostname.

参数

hostname: The Internet host name.
mxhosts: A list of the MX records found is placed into the array mxhosts.
weight: If the weight array is given, it will be filled with the weight information gathered.

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
5.3.0	This function is now available on Windows platforms.

注释

Note:
This function should not be used for the purposes of address verification. Only the mailexchangers found in DNS are returned, however, according to » RFC 2821 when no mail exchangers are listed, hostname itself should be used as the only mail exchanger with a priority of 0.

Note:
For compatibility with Windows before this was implemented, then try the » PEAR class » Net_DNS.

参见

checkdnsrr() - Check DNS records corresponding to a given Internet host name or IP address
dns_get_record() - Fetch DNS Resource Records associated with a hostname
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
gethostbyaddr() - Get the Internet host name corresponding to a given IP address
the named(8) manual page