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
