プログラムのデバッグをする際、スタックトレースを用いれば、呼び出し箇所を容易に特定できます。
その出力方法です。
debug_backtrace()関数を使用します。
公式ドキュメントはこちら。
このように使用して出力します。
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$backtrace = debug_backtrace(); foreach ($backtrace as $item) { $file = array_key_exists('file', $item) ? $item['file'] : ''; $line = array_key_exists('line', $item) ? $item['line'] : ''; $class = array_key_exists('class', $item) ? $item['class'] : ''; $type = array_key_exists('type', $item) ? $item['type'] : ''; $function = $item['function']; error_log( sprintf( __METHOD__ ." %s:%d %s%s%s" , $file , $line , $class , $type , $function ) ); } |
__METHOD__ 定数を利用している理由は、この処理を組み込んだ箇所を忘れないようにする為です。
実行結果の例を以下に記します。
これはLumen フレームワークを用いたアプリケーションで、Illuminate\Database\Connection::runQueryCallback()メソッドの呼び出し経路を、Log ファサードのdebug()メソッドを利用して出力したものです。
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[2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/illuminate/database/Connection.php:625 Illuminate\Database\Connection->runQueryCallback [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/illuminate/database/Connection.php:334 Illuminate\Database\Connection->run [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/illuminate/database/Query/Builder.php:1963 Illuminate\Database\Connection->select [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/illuminate/database/Query/Builder.php:1951 Illuminate\Database\Query\Builder->runSelect [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/illuminate/database/Query/Builder.php:2435 Illuminate\Database\Query\Builder->Illuminate\Database\Query\{closure} [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/illuminate/database/Query/Builder.php:1952 Illuminate\Database\Query\Builder->onceWithColumns [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/illuminate/database/Eloquent/Builder.php:481 Illuminate\Database\Query\Builder->get [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/illuminate/database/Eloquent/Builder.php:465 Illuminate\Database\Eloquent\Builder->getModels [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/illuminate/database/Concerns/BuildsQueries.php:77 Illuminate\Database\Eloquent\Builder->get [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/app/Http/Controllers/Controller.php:34 Illuminate\Database\Eloquent\Builder->first [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback :0 App\Http\Controllers\Controller->show [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/illuminate/container/BoundMethod.php:29 call_user_func_array [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/illuminate/container/BoundMethod.php:87 Illuminate\Container\BoundMethod::Illuminate\Container\{closure} [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/illuminate/container/BoundMethod.php:31 Illuminate\Container\BoundMethod::callBoundMethod [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/illuminate/container/Container.php:564 Illuminate\Container\BoundMethod::call [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/laravel/lumen-framework/src/Concerns/RoutesRequests.php:373 Illuminate\Container\Container->call [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/laravel/lumen-framework/src/Concerns/RoutesRequests.php:339 Laravel\Lumen\Application->callControllerCallable [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/laravel/lumen-framework/src/Concerns/RoutesRequests.php:313 Laravel\Lumen\Application->callLumenController [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/laravel/lumen-framework/src/Concerns/RoutesRequests.php:275 Laravel\Lumen\Application->callControllerAction [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/laravel/lumen-framework/src/Concerns/RoutesRequests.php:260 Laravel\Lumen\Application->callActionOnArrayBasedRoute [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/laravel/lumen-framework/src/Concerns/RoutesRequests.php:160 Laravel\Lumen\Application->handleFoundRoute [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback :0 Laravel\Lumen\Application->Laravel\Lumen\Concerns\{closure} [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/laravel/lumen-framework/src/Routing/Pipeline.php:52 call_user_func [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback :0 Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure} [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/laravel/lumen-framework/src/Routing/Pipeline.php:32 call_user_func [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback :0 Illuminate\Pipeline\Pipeline->Illuminate\Pipeline\{closure} [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/laravel/lumen-framework/src/Routing/Pipeline.php:32 call_user_func [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/illuminate/pipeline/Pipeline.php:104 Laravel\Lumen\Routing\Pipeline->Laravel\Lumen\Routing\{closure} [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/laravel/lumen-framework/src/Concerns/RoutesRequests.php:410 Illuminate\Pipeline\Pipeline->then [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/laravel/lumen-framework/src/Concerns/RoutesRequests.php:166 Laravel\Lumen\Application->sendThroughPipeline [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/vendor/laravel/lumen-framework/src/Concerns/RoutesRequests.php:107 Laravel\Lumen\Application->dispatch [2019-02-01 22:00:05] development.DEBUG: Illuminate\Database\Connection::runQueryCallback /var/www/public/index.php:28 Laravel\Lumen\Application->run |
私はフレームワークの拡張を行う際に、このような調査をよく行っています。
例えば、
- Aクラスを継承し、BメソッドをオーバーライドしたCクラスを作成
- Aクラスの生成箇所を特定
- そこをCクラスのインスタンス生成処理と変更
このような生成処理を行っている箇所を特定する場合等です。
posted with ヨメレバ
Kevin Tatroe,Peter MacIntyre,Rasmus Lerdorf オライリージャパン 2014-03-25
宮崎県在住。
プログラムを書いて暮らしています。趣味はルアーフィッシング、ギター。