getmxrr

(PHP 4, PHP 5, PHP 7)

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() - 给指定的主机（域名）或者IP地址做DNS通信检查
  • dns_get_record() - 获取指定主机的DNS记录
  • 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() - 获取指定的IP地址对应的主机名
  • the named(8) manual page