如何在Laravel中准确解析和验证域名？使用bakame/laravel-domain-parser轻松搞定！

<code class="bash">composer require bakame/laravel-domain-parser</code>

<pre class="brush:php;toolbar:false;"><?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Bakame\Laravel\Pdp\DomainParser;
use Pdp\Domain; // 这是底层 PHP Domain Parser 库的 Domain 对象

class DomainProcessorController extends Controller
{
    protected $domainParser;

    // 通过构造函数依赖注入获取 DomainParser 实例
    public function __construct(DomainParser $domainParser)
    {
        $this->domainParser = $domainParser;
    }

    public function processUserDomains(Request $request)
    {
        $url = 'https://www.blog.example.co.uk/some/path?query=value';
        $email = 'user@sub.example.com';
        $invalidDomain = 'my-internal-app.local'; // .local 通常不是公共后缀
        $idnUrl = 'http://xn--fiqs8s.xn--fiqz9s/'; // 国际化域名示例：.中国.公司

        echo "<h2>解析 URL 域名</h2>";
        // parseUrl 方法可以从完整的 URL 中提取并解析域名
        $domainFromUrl = $this->domainParser->parseUrl($url);
        if ($domainFromUrl instanceof Domain) {
            echo "<p>原始域名: " . $domainFromUrl->toString() . "</p>"; // www.blog.example.co.uk
            echo "<p>可注册域名: " . ($domainFromUrl->registrableDomain() ? $domainFromUrl->registrableDomain()->toString() : 'N/A') . "</p>"; // example.co.uk
            echo "<p>公共后缀: " . ($domainFromUrl->publicSuffix() ? $domainFromUrl->publicSuffix()->toString() : 'N/A') . "</p>"; // co.uk
            echo "<p>子域名: " . ($domainFromUrl->subDomain() ? $domainFromUrl->subDomain()->toString() : 'N/A') . "</p>"; // www.blog
        } else {
            echo "<p>无法解析 URL 域名。</p>";
        }

        echo "<h2>解析邮箱域名</h2>";
        // parseEmail 方法可以从邮箱地址中提取并解析域名
        $domainFromEmail = $this->domainParser->parseEmail($email);
        if ($domainFromEmail instanceof Domain) {
            echo "<p>原始域名: " . $domainFromEmail->toString() . "</p>
                    <div class="aritcle_card">
                        <a class="aritcle_card_img" href="/ai/%E5%A5%87%E5%9F%9F">
                            <img src="https://img.php.cn/upload/ai_manual/000/000/000/175680358236649.png" alt="奇域">
                        </a>
                        <div class="aritcle_card_info">
                            <a href="/ai/%E5%A5%87%E5%9F%9F">奇域</a>
                            <p>奇域是一个专注于中式美学的国风AI绘画创作平台</p>
                            <div class="">
                                <img src="/static/images/card_xiazai.png" alt="奇域">
                                <span>30</span>
                            </div>
                        </div>
                        <a href="/ai/%E5%A5%87%E5%9F%9F" class="aritcle_card_btn">
                            <span>查看详情</span>
                            <img src="/static/images/cardxiayige-3.png" alt="奇域">
                        </a>
                    </div>
                "; // sub.example.com
            echo "<p>可注册域名: " . ($domainFromEmail->registrableDomain() ? $domainFromEmail->registrableDomain()->toString() : 'N/A') . "</p>"; // example.com
            echo "<p>公共后缀: " . ($domainFromEmail->publicSuffix() ? $domainFromEmail->publicSuffix()->toString() : 'N/A') . "</p>"; // com
        } else {
            echo "<p>无法解析邮箱域名。</p>";
        }

        echo "<h2>域名有效性验证</h2>";
        // isValid 方法可以检查一个域名是否是有效的公共后缀域名
        $isValidUrl = $this->domainParser->isValid($url);
        $isValidLocal = $this->domainParser->isValid($invalidDomain);
        echo "<p>'$url' 是否有效? " . ($isValidUrl ? '是' : '否') . "</p>";
        echo "<p>'$invalidDomain' 是否有效? " . ($isValidLocal ? '是' : '否') . "</p>"; // 结果为否，因为 .local 不是公共后缀

        echo "<h2>处理国际化域名 (IDN)</h2>";
        // parseUrl 同样可以处理包含 IDN 的 URL
        $idnParsed = $this->domainParser->parseUrl($idnUrl);
        if ($idnParsed instanceof Domain) {
            echo "<p>原始 IDN (Punycode): " . $idnParsed->toString() . "</p>"; // xn--fiqs8s.xn--fiqz9s
            // 如果需要显示 Unicode 形式，通常需要额外的 IDNA 转换工具，如 PHP 的 idn_to_utf8 函数
            // echo "<p>IDN (Unicode): " . idn_to_utf8($idnParsed->toString(), IDNA_NONTRANSITIONAL_TO_ASCII, INTL_IDNA_VARIANT_UTS46) . "</p>";
            echo "<p>可注册域名 (Punycode): " . ($idnParsed->registrableDomain() ? $idnParsed->registrableDomain()->toString() : 'N/A') . "</p>";
        } else {
            echo "<p>无法解析 IDN 域名。</p>";
        }
    }
}