① In computer science, a memory leak is a type of resource leak that occurs when a computer program incorrectly manages memory allocations in such a way that memory which is no longer needed is not released.
② A memory leak may also happen when an object is stored in memory but cannot be accessed by the running code.
少し意訳すると
① コンピューター工学において、Memory Leakとは、プログラムで、もう使わないのに解除されないような、間違ったメモリ空間の割当により起きる、有限な資源の無駄遣いの現象です。
② 一例として、memory leakは、メモリに保存はされているものの、実行コード上ではこれ以上サクセスされないオブジェクトにより起きることもありえます。
privatefunctiondoExampleGcBasic(){//...中略Log::debug(null,['event'=>'new','msg'=>'V']);$alive=newAliveInScope('V');//...中略Log::debug(null,['event'=>'new','msg'=>'A, B']);$circleA=newCircularReference('A');$circleB=newCircularReference('B');Log::debug(null,['event'=>'set','msg'=>'$alive`s reference to A']);$circleA->addNode($alive);Log::debug(null,['event'=>'set','msg'=>'circluar reference on A B']);$circleA->addNode($circleB);$circleB->addNode($circleA);xdebug_debug_zval('alive');xdebug_debug_zval('circleA');xdebug_debug_zval('circleB');$this->logMemUsage();Log::debug(null,['event'=>'unset','msg'=>'A, B']);unset($circleA);unset($circleB);xdebug_debug_zval('alive');xdebug_debug_zval('circleA');xdebug_debug_zval('circleB');$this->logMemUsage();//...中略
[2020-09-07 20:30:37] local.DEBUG: {"event":"unset","msg":"A, B"}
alive: (refcount=2, is_ref=0)=class App\Console\Commands\AliveInScope { private
circleA: no such symbol
circleB: no such symbol
[2020-09-07 20:30:37] local.DEBUG: {"Memory Usage(Bytes)":"79,015,672"}
<?php
use App\Jobs\ProcessPodcast;
use App\Podcast;
use Illuminate\Bus\Batch;
use Illuminate\Support\Facades\Batch;
use Throwable;
$batch = Bus::batch([
new ProcessPodcast(Podcast::find(1)),
new ProcessPodcast(Podcast::find(2)),
new ProcessPodcast(Podcast::find(3)),
new ProcessPodcast(Podcast::find(4)),
new ProcessPodcast(Podcast::find(5)),
])->then(function (Batch $batch) {
// All jobs completed successfully...
})->catch(function (Batch $batch, Throwable $e) {
// First batch job failure detected...
})->finally(function (Batch $batch) {
// The batch has finished executing...
})->dispatch();
return $batch->id;
/**
* Determine if the given option is the current selected option.
*
* @param string $option
* @return bool
*/
public function isSelected($option)
{
return $option === $this->selected;
}
use App\Events\PodcastProcessed;
use function Illuminate\Events\queueable;
use Illuminate\Support\Facades\Event;
Event::listen(queueable(function (PodcastProcessed $event) {
//
}));
<?php
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;
Schema::table('failed_jobs', function (Blueprint $table) {
$table->string('uuid')->after('id')->unique();
});
/**
* Get the value of a given key and then forget it.
*
* @param string $key
* @param mixed $default
* @return mixed
*/
public function pull($key, $default = null);
[Upgrade][Medium] Testing, The assertExactJson Method
<!-- html --><formmethod="post"><label>苗字：<inputtype="text"size="10"name="fname"></label><inputtype="submit"value="送信"></form><formmethod="post"><label>名前：<inputtype="text"size="10"name="name"></label><inputtype="submit"value="送信"></form>
<!-- html --><formmethod="post"><label>苗字：<inputtype="text"size="10"name="fname"></label><buttontype="submit"name="btn"value="insert">送信</button></form><formmethod="post"><label>名前：<inputtype="text"size="10"name="name"></label><buttontype="submit"name="btn"value="updata">送信</button></form>
firebase.auth().currentUser.getIdToken(/* forceRefresh */true).then(function(idToken){// Send token to your backend via HTTPS// ...}).catch(function(error){// Handle error});
Firebase Admin SDK for PHPには似たような機能はなかった。
トークンが切れるたびにいちいちログインし直すのもなんだか嫌。
