EventDnsBase::__construct

(PECL event >= 1.2.6-beta)

EventDnsBase::__construct — Constructs EventDnsBase object

说明

public EventDnsBase::__construct( EventBase $base , int|bool $initialize )

Constructs EventDnsBase object.

参数

base

Event base.

initialize

If initialize is true, it attempts to use the underlying operating system defaults to configure the DNS base senibly. If it is false, the DNS base is left unconfigured, with no nameservers or options set. In the latter case the DNS base should be configured manually, e.g. with EventDnsBase::parseResolvConf().

If initialize is an integer, it must be one of the following flags:

Flag	说明
`EventDnsBase::DISABLE_WHEN_INACTIVE`	Do not prevent the libevent event loop from exiting when we have no active DNS requests.
`EventDnsBase::INITIALIZE_NAMESERVERS`	Process the `resolv.conf`.
`EventDnsBase::NAMESERVERS_NO_DEFAULT`	Do not add default nameserver if there are no nameservers in the `resolv.conf`.

错误／异常

If initialize has a type other than int|bool, a TypeError is thrown.

If the value of initialize is invalid, a EventException is thrown.

更新日志

版本	说明
PECL event 3.1.3	If `initialize` has a type other than int\|bool, a TypeError is thrown.
PECL event 3.1.0RC1	The type of the `initialize` parameter has been changed from bool to mixed. The value can be either bool (preserving the previous meaning) or one of the following constants: `EventDnsBase::DISABLE_WHEN_INACTIVE`, `EventDnsBase::INITIALIZE_NAMESERVERS`, or `EventDnsBase::NAMESERVERS_NO_DEFAULT`.

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