Question

laravel\app\console\command怎么用

Answer 1

场景
比如使用redis作为计数器，然后在每天的凌晨将计数保存到MySQL
比如定时执行一些批量的任务
扩展artisan的command
例子：批量将文字题目生成为图片
artisan command:make QuestionCommand
#　app/command/QuestionCommand.php

生成php文件之后，首先需要修改name为你的命令
protected $name = 'question:gen';

getArguments, getOptions 分别为获取参数和选项的值
getArguments // command arg1 arg2
getOptions // command --opt1=val1 --opt2=val2
fire // 执行命令的时候具体要做的事情

较为完整的例子
<?php

use Illuminate\Console\Command;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Input\InputArgument;

class QuestionCommand extends Command {

/**
* The console command name.
*
* @var string
*/
protected $name = 'question:gen';

/**
* The console command description.
*
* @var string
*/
protected $description = '生成question图片';

/**
* Create a new command instance.
*
* @return void
*/
public function __construct()
{
parent::__construct();
}

/**
* Execute the console command.
*
* @return void
*/
public function fire()
{
$questions = $this->option('all') ? Question::all() : Question::whereThumb(0)->get();
// 初始化markdown解析引擎
$ciconia = new Ciconia\Ciconia();
$ciconia->addExtension(new Ciconia\Extension\Gfm\FencedCodeBlockExtension());
$ciconia->addExtension(new Ciconia\Extension\Gfm\TaskListExtension());
$ciconia->addExtension(new Ciconia\Extension\Gfm\InlineStyleExtension());
$ciconia->addExtension(new Ciconia\Extension\Gfm\WhiteSpaceExtension());
$ciconia->addExtension(new Ciconia\Extension\Gfm\TableExtension());
foreach ($questions as $question) {
$item = array(
'id' => $question->id,
'absPath' => public_path('upload/question/' . $question->id . '.png'),
'relPath' => 'question/' . $question->id . '.png',
'question' => $ciconia->render($question->question),
);
Queue::push('code2png', $item, 'code2png');
$this->info('Question ' . $question->id . ' has been added to the queue.');
}
}

/**
* Get the console command arguments.
*
* @return array
*/
protected function getArguments()
{
return array(
// array('example', InputArgument::REQUIRED, 'An example argument.'),
);
}

/**
* Get the console command options.
*
* @return array
*/
protected function getOptions()
{
return array(
array('all', null, InputOption::VALUE_OPTIONAL, '全部重新生成', null),
);
}

}

需要在app/start/artisan.php里面添加下面一行才会生效
// 4.0
$artisan->add(new QuestionCommand);
// 4.1
Artisan::add(new QuestionCommand);

命令行中这样执行
artisan question:gen --all=1

如果要在Controller里面调用，可以这样
Artisan::call('question:gen', array('--all' => 1));