域名系统 amphp/dns为提供异步DNS名称解析。 安装 composer require amphp/dns 例 <?php require __DIR__ . '/examples/_bootstrap.php' ; use Amp \ Dns ; use Amp \ Loop ; Loop :: run ( function () { $ githubIpv4 = yield Dns \resolve ( "github.com" , Dns \ Record :: A ); pretty_print_records ( "github.com" , $ gi