The EventDnsBase class

    (PECL event >= 1.2.6-beta)

    Introduction

    Represents Libevent's DNS base structure. Used to resolve DNS asyncronously, parse configuration files like resolv.conf etc.

    Class synopsis

    finalclassEventDnsBase {
    constintOPTION_SEARCH = 1;
    constintOPTION_NAMESERVERS = 2;
    constintOPTION_MISC = 4;
    constintOPTION_HOSTSFILE = 8;
    constintOPTIONS_ALL = 15;
    constintDISABLE_WHEN_INACTIVE = 32768;
    constintINITIALIZE_NAMESERVERS = 1;
    constintNAMESERVERS_NO_DEFAULT = 65536;
    public__construct(EventBase$base, int|bool$initialize)
    publicaddNameserverIp(string$ip): bool
    publicaddSearch(string$domain): void
    publicclearSearch(): void
    publiccountNameservers(): int
    publicloadHosts(string$hosts): bool
    publicparseResolvConf(int$flags, string$filename): bool
    publicsetOption(string$option, string$value): bool
    publicsetSearchNdots(int$ndots): bool
    }

    Predefined Constants

    Tells to read the domain and search fields from the resolv.conf file and the ndots option, and use them to decide which domains(if any) to search for hostnames that aren’t fully-qualified.

    EventDnsBase::OPTION_NAMESERVERS

    Tells to learn the nameservers from the resolv.conf file.

    EventDnsBase::OPTION_MISC

    EventDnsBase::OPTION_HOSTSFILE

    Tells to read a list of hosts from /etc/hosts as part of loading the resolv.conf file.

    EventDnsBase::OPTIONS_ALL

    Tells to learn as much as it can from the resolv.conf file.

    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.

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