Laravel-breadcrumbsを使って簡単にパンくずの構造化マークアップを実装する方法（全てのページに適用する手順）

{{ Breadcrumbs::render('登録名') }}
{{ Breadcrumbs::render('登録名', 変数) }}

Breadcrumbs::for('パンくず名', function ($trail) {
    $trail->push('タイトル', 'URL');
});

Breadcrumbs::for('パンくず名', function ($trail) {
    $trail->parent('親のパンくず名');
    $trail->push('タイトル', 'URL');
});

Breadcrumbs::for('パンくず名', function ($trail, $変数) {
    $trail->parent('親のパンくず名', $変数->プロパティ名);
    $trail->push($変数名->タイトルのプロパティ名, route('ルート名', $変数名->スラッグのプロパティ名));
});

Breadcrumbs::generate('登録名')
Breadcrumbs::gererate('登録名', 変数)

<?php

namespace App\Services;

class JsonLd
{
    //構造化データを入れる変数を定義
    private $collection;

    //空のコレクションを格納
    public function __construct() {
        $this->collection = collect([]);
    }

    //Collectionへの追加
    public function pushCollection($item) {
        if (is_array($item)) {
            $item = collect($item);
        }

        $this->collection->push($item);
        return $this;
    }

    //パンくずの構造化データ形成
    public function putBreadcrumbList($breadcrumbs) {
        return self::pushCollection([
            '@type' => 'BreadcrumbList',
            'itemListElement' => $breadcrumbs->map(function($breadcrumb, $i) {
                return ['@type'=>'ListItem','position'=>$i+1, 'name'=> $breadcrumb->title, 'item'=>$breadcrumb->url ];
            }),
        ]);
    }

    
    //コレクションをJsonに変換
    public function renderJson() {
        return json_encode($this->collection->map(function($item){
            $item['@context'] = 'http://schema.org';
            return $item;
        })->values());
    }
}

    <script type="application/ld+json">
    {
      "@context": "https://schema.org",
      "@type": "BreadcrumbList",
      "itemListElement": [{
        "@type": "ListItem",
        "position": 1,
        "name": "Books",
        "item": "https://example.com/books"
      },{
        "@type": "ListItem",
        "position": 2,
        "name": "Science Fiction",
        "item": "https://example.com/books/sciencefiction"
      },{
        "@type": "ListItem",
        "position": 3,
        "name": "Award Winners"
      }]
    }
    </script>

    //パンくずの構造化データ形成
    public function putBreadcrumbList($breadcrumbs) {
        return self::pushCollection([
            '@type' => 'BreadcrumbList',
            'itemListElement' => $breadcrumbs->map(function($breadcrumb, $i) {
                return ['@type'=>'ListItem','position'=>$i+1, 'name'=> $breadcrumb->title, 'item'=>$breadcrumb->url ];
            }),
        ]);
    }

    //Collectionへの追加
    public function pushCollection($item) {
        if (is_array($item)) {
            $item = collect($item);
        }

        $this->collection->push($item);
        return $this;
    }

    //コレクションをJsonに変換
    public function renderJson() {
        return json_encode($this->collection->map(function($item){
            $item['@context'] = 'http://schema.org';
            return $item;
        })->values());
    }

    public function register()
    {
        $this->app->singleton('サービス名', function ($app) {
            処理;
        });
    }

<?php

namespace App\Providers;

use Illuminate\Support\ServiceProvider;
use App\Services\JsonLd;

class AppServiceProvider extends ServiceProvider
{
    /**
     * Register any application services.
     *
     * @return void
     */
    public function register()
    {
        $this->app->singleton('JsonLd', function () {
            return new JsonLd();
        });
    }

    /**
     * Bootstrap any application services.
     *
     * @return void
     */
    public function boot()
    {
        //
    }

}

<?php

namespace App\Facades;

use Illuminate\Support\Facades\Facade;

class JsonLdFacade extends Facade
{
    protected static function getFacadeAccessor()
    {
        return 'JsonLd';
    }
}

    'aliases' => [

        //省略
        'JsonLd' => App\Facades\JsonLdFacade::class,
    ],

<?php

if (! function_exists('ヘルパ名')) {
    function ヘルパ名(引数)
    {
        //処理;
    }
}

if(! function_exists( "structured_markup" )){
    function structured_markup($breadcrumbs){        
        //パンくず構造化マークアップ
        JsonLd::putBreadcrumbList($breadcrumbs);
    }
}

    "autoload": {
        "files": [
            "app/helpers.php"
        ],
    }

$ composer dump-autoload

@php
//パンくずの生成
$currentRoute = route()->getName();
$breadcrumbsHtml = Breadcrumbs::render( $currentRoute );
$breadcrumbs = Breadcrumbs::generate( $currentRoute );

//Breadcrumbsの構造化データ生成
structured_markup($breadcrumbs);
@endphp

<!DOCTYPE html>
<html lang="ja">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
    <meta name="description" content="説明">
    <meta name="keywords" content="キーワード">
    <title>タイトル</title>

    {{-- Structured Markup --}}
     <script type="application/ld+json">
        {!! JsonLd::renderJson() !!}
    </script>

</head>
<body">
    @include('layouts.header')
    {{ $breadcrumbsHtml }}
    <div class="@yield('contentClass')">
        @yield('content')
    </div>
    @include('layouts.footer')
</body>
</html>

        preg_match_all( "|href=\"(.*)\"|", $breadcrumbs, $urls );
        preg_match_all( "|<a [^>]+>(.*)</a>|", $breadcrumbs, $titles );
        preg_match_all( "|<li[^>]+active\">(.*)</li>|", $breadcrumbs, $currentTitle );

        $items = [];
        $num = count($urls[1]);
        for ($i=0; $i<$num; $i++){
            array_push($items, []);
        }

        foreach ($urls[1] as $i => $url){
            array_push($items[$i], $url);
        }

        foreach ($titles[1] as $i => $title){
            array_push($items[$i], $title);
        }

        if( Route::currentRouteName() === 'top' ){
            $currentTitle = "HOME";
        }
        else{ $currentTitle = $currentTitle[1][0];}
        $currentUrl= url()->current();

        array_push($items, [$currentUrl, $currentTitle]);

        JsonLd::putBreadcrumbList($items);

array:2 [▼
  0 => array:3 [▼
    0 => "<a href="http://localhost:13001">Home</a>"
    1 => "<a href="http://localhost:13001/blog">Blog</a>"
    2 => "<a href="http://localhost:13001/blog/technology">Technology</a>"
  ]
  1 => array:3 [▼
    0 => "Home"
    1 => "Blog"
    2 => "Technology"
  ]
]

   //パンくずの構造化マークアップデータの作成（コレクション形式） 
   public function putBreadcrumbList($items) {
        return self::pushCollection([
            '@type' => 'BreadcrumbList',
            'itemListElement' => collect($items)->map(function($item, $i) {
                return ['@type'=>'ListItem','position'=>$i+1, 'name'=> $item[1], 'item'=>$item[0] ];
            }),
        ]);
    }

   //コレクションをJsonに変換
    public function renderJson() {
        return json_encode($this->collection->map(function($item){
            $item['@context'] = 'http://schema.org';
            return $item;
        })->values());
    }