【Laravel】アダルトコンテンツが含まれる画像を判定する

composer require aws/aws-sdk-php

AWS_ACCESS_KEY_ID=#ここにアクセスキーを入れます#
AWS_SECRET_ACCESS_KEY=#ここにシークレットキーを入れます#
AWS_DEFAULT_REGION=ap-northeast-1 #東京リージョンを指定します。

php artisan make:controller RekognitionController

<?php

namespace App\Http\Controllers;

use Aws\Rekognition\RekognitionClient;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Storage;

class RekognitionController extends Controller
{


    public function upload(Request $request)
    {
        // バリデーション
        $request->validate(
            [
                'file' => 'required|file',
            ]
        );

        $file = $request->file('file');

        // ファイル保存する際の名前を作成する
        $filename = time() . '_' . $file->getClientOriginalName();

        // ファイルを保存する
        $result = $file->move(storage_path('app'), $filename);

        // アップロードの成功判定
        if ($result) {
            return 'アップロード成功';
        }else {
            return 'アップロード失敗';
        }
    }

    //
    public function rekognition($filename)
    {

        // 画像データを取得
        $image = Storage::disk('local')->get($filename);

        // オプションを定義
        $option = [
            'version' => 'latest',  // バージョン
            'region' => 'ap-northeast-1'    // APIのリージョン
        ];

        $client = new RekognitionClient($option);

        $result = $client->detectModerationLabels([
            'Image' => [
                'Bytes' => $image,
            ],
        ]);

        return view('result', compact('result'));
    }
    
    
}

<?php


return [

    /*
    |--------------------------------------------------------------------------
    | Top-Level Category
    |--------------------------------------------------------------------------
    |
    */
    'top_level_category' => [
        'Explicit Nudity' => '露骨なヌード',
        'Suggestive' => '挑発的な',
        'Violence' => '暴力',
        'Visually Disturbing' => '視覚的に邪魔',
        'Rude Gestures' => '失礼なジェスチャー',
        'Drugs' => '薬物',
        'Tobacco' => 'タバコ',
        'Alcohol' => 'アルコール',
        'Gambling' => 'ギャンブル',
        'Hate Symbols' => 'ヘイトシンボル',
    ],


    /*
    |--------------------------------------------------------------------------
    | Second-Level Category
    |--------------------------------------------------------------------------
    |
    */
    'second_level_category' => [
        'Explicit Nudity' => [
            'Nudity' => 'ヌード',
            'Graphic Male Nudity' => '生々しい男性のヌード',
            'Graphic Female Nudity' => '写実的な女性のヌード',
            'Sexual Activity' => '性行為',
            'Illustrated Explicit Nudity' => '露骨なヌードのイラスト',
            'Adult Toys' => '大人のおもちゃ',
        ],
        'Suggestive' => [
            'Female Swimwear Or Underwear' => '女性の水着や下着',
            'Male Swimwear Or Underwear' => '男性の水着または下着',
            'Partial Nudity' => '部分的なヌード',
            'Barechested Male' => 'はだしの男性',
            'Revealing Clothes' => '露出服',
            'Sexual Situations' => '性的状況',
        ],
        'Violence' => [
            'Graphic Violence Or Gore' => '生々しい暴力またはゴア',
            'Physical Violence' => '身体的暴力',
            'Weapon Violence' => '武器による暴力',
            'Weapons' => '兵器',
            'Self Injury' => '自己傷害',
        ],
        'Visually Disturbing' => [
            'Emaciated Bodies' => '衰弱した体',
            'Corpses' => '死体',
            'Hanging' => 'ハンギング',
            'Air Crash' => 'エアクラッシュ',
            'Explosions And Blasts' => '爆発と爆発',
        ],
        'Rude Gestures' => [
            'Middle Finger' => '中指',
        ],
        'Drugs' => [
            'Drug Products' => '医薬品',
            'Drug Use' => '薬物使用',
            'Pills' => '丸薬',
            'Drug Paraphernalia' => '麻薬関連器具',
        ],
        'Tobacco' => [
            'Tobacco Products' => 'たばこ製品',
            'Smoking' => '喫煙',
        ],
        'Alcohol' => [
            'Drinking' => '飲酒',
            'Alcoholic Beverages' => 'アルコール飲料',
        ],
        'Gambling' => [
            'Gambling' => 'ギャンブル',
        ],
        'Hate Symbols' => [
            'Nazi Party' => 'ナチ党',
            'White Supremacy' => '白人至上主義',
            'Extremist' => '過激派',
        ],
    ],


];

<?php

use Illuminate\Support\Facades\Route;
use Illuminate\Support\Facades\Storage;

/*
|--------------------------------------------------------------------------
| Web Routes
|--------------------------------------------------------------------------
|
| Here is where you can register web routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| contains the "web" middleware group. Now create something great!
|
*/

// 画像アップロードページとアップロードされた画像一覧を表示する
Route::get('/', function () {
    $fileList = Storage::disk('local')->allFiles();
    return view('index', compact('fileList'));
});

// アップロード処理
Route::post('/upload', [\App\Http\Controllers\RekognitionController::class, 'upload'])->name('upload');

// 指定されたファイルをAmazon Rekognitionへ送信して画像分析結果を表示する
Route::get('/rekognition/{filename}', [\App\Http\Controllers\RekognitionController::class, 'rekognition'])->name('rekognition');

// Storage内の画像データをレスポンスする
Route::get('/image/{filename}', function ($filename) {
    return Storage::disk('local')->get($filename);
})->name('image');

<!doctype html>
<html lang="ja">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>ファイルアップロード</title>
</head>
<body>
<form action="{{ route('upload') }}" method="post" enctype="multipart/form-data">
    @csrf
    <input type="file" name="file" id="">
    <input type="submit" value="アップロード">
</form>
<ul>
    @foreach($fileList as $item)
        <li><a href="{{ route('rekognition', ['filename' => $item]) }}">{{ $item }}</a></li>
    @endforeach
</ul>
</body>
</html>

<!doctype html>
<html lang="ja">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>画像分析結果</title>
</head>
<body>
    @if($result['ModerationLabels'])
        <h1 style="background-color: red; color: #fff;">
            @foreach($result['ModerationLabels'] as $key => $item)
                @if($item['ParentName'] == "")
                    {{ config('rekognition.top_level_category.' . $item['Name']) }}
                @else
                    {{ config('rekognition.second_level_category.' . $item['Name']) }}
                    {{ config('rekognition.top_level_category.' . $item['ParentName']) }}
                @endif
            @endforeach
        </h1>
    @else
        <h1 style="background-color: green;color: #fff;">不適切なコンテンツではありません。</h1>
    @endif
    <div style="display: flex">
        <img src="{{ route('image', ['filename' => request('filename')]) }}" alt="" style="width: 300px;">
        <textarea name="" id="" cols="100" rows="20">{{ var_dump($result, true) }}</textarea>
    </div>
</body>
</html>

object(Aws\Result)#493 (2) {
  ["data":"Aws\Result":private]=>
  array(3) {
    ["ModerationLabels"]=>
    array(0) {
    }
    ["ModerationModelVersion"]=>
    string(3) "6.0"
    ["@metadata"]=>
    array(4) {
      ["statusCode"]=>
      int(200)
      ["effectiveUri"]=>
      string(48) "https://rekognition.ap-northeast-1.amazonaws.com"
      ["headers"]=>
      array(4) {
        ["x-amzn-requestid"]=>
        string(36) "050a27db-3933-48b7-8256-9100ed271df9"
        ["content-type"]=>
        string(26) "application/x-amz-json-1.1"
        ["content-length"]=>
        string(2) "54"
        ["date"]=>
        string(29) "Thu, 15 Dec 2022 09:37:38 GMT"
      }
      ["transferStats"]=>
      array(1) {
        ["http"]=>
        array(1) {
          [0]=>
          array(0) {
          }
        }
      }
    }
  }
  ["monitoringEvents":"Aws\Result":private]=>
  array(0) {
  }
}

object(Aws\Result)#492 (2) {
  ["data":"Aws\Result":private]=>
  array(3) {
    ["ModerationLabels"]=>
    array(3) {
      [0]=>
      array(3) {
        ["Confidence"]=>
        float(95.30232238769531)
        ["Name"]=>
        string(15) "Sexual Activity"
        ["ParentName"]=>
        string(15) "Explicit Nudity"
      }
      [1]=>
      array(3) {
        ["Confidence"]=>
        float(95.30232238769531)
        ["Name"]=>
        string(15) "Explicit Nudity"
        ["ParentName"]=>
        string(0) ""
      }
      [2]=>
      array(3) {
        ["Confidence"]=>
        float(67.88583374023438)
        ["Name"]=>
        string(6) "Nudity"
        ["ParentName"]=>
        string(15) "Explicit Nudity"
      }
    }
    ["ModerationModelVersion"]=>
    string(3) "6.0"
    ["@metadata"]=>
    array(4) {
      ["statusCode"]=>
      int(200)
      ["effectiveUri"]=>
      string(48) "https://rekognition.ap-northeast-1.amazonaws.com"
      ["headers"]=>
      array(4) {
        ["x-amzn-requestid"]=>
        string(36) "992c89b7-077b-42f4-97a6-9d685e36652a"
        ["content-type"]=>
        string(26) "application/x-amz-json-1.1"
        ["content-length"]=>
        string(3) "296"
        ["date"]=>
        string(29) "Thu, 15 Dec 2022 09:40:14 GMT"
      }
      ["transferStats"]=>
      array(1) {
        ["http"]=>
        array(1) {
          [0]=>
          array(0) {
          }
        }
      }
    }
  }
  ["monitoringEvents":"Aws\Result":private]=>
  array(0) {
  }
}

["ModerationLabels"]=>
    array(3) {
      [0]=>
      array(3) {
        ["Confidence"]=>
        float(95.30232238769531)
        ["Name"]=>
        string(15) "Sexual Activity"
        ["ParentName"]=>
        string(15) "Explicit Nudity"
      }
      [1]=>
      array(3) {
        ["Confidence"]=>
        float(95.30232238769531)
        ["Name"]=>
        string(15) "Explicit Nudity"
        ["ParentName"]=>
        string(0) ""
      }
      [2]=>
      array(3) {
        ["Confidence"]=>
        float(67.88583374023438)
        ["Name"]=>
        string(6) "Nudity"
        ["ParentName"]=>
        string(15) "Explicit Nudity"
      }
    }