PHP：如何使用 monolog 登录到控制台 (php://out)？
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PHP: How to use monolog to log to console (php://out)?
提问by Hirnhamster
I just switched to monolog and wanted to log my message to the PHP console instead of a file. This might seem obvious for some people, but it took me a little while to figure out how to do that and I couldn't find a similar question/answer on SO.
我刚刚切换到 monolog 并想将我的消息记录到 PHP 控制台而不是文件。对于某些人来说，这似乎很明显，但是我花了一些时间才弄清楚如何做到这一点，而且我在 SO 上找不到类似的问题/答案。
The example on Monolog's Github readmeonly shows how to use a file:
Monolog 的 Github 自述文件中的示例仅展示了如何使用文件：
<?php
use Monolog\Logger;
use Monolog\Handler\StreamHandler;
// create a log channel
$log = new Logger('name');
$log->pushHandler(new StreamHandler('path/to/your.log', Logger::WARNING)); // <<< uses a file
// add records to the log
$log->addWarning('Foo');
$log->addError('Bar');
But it doesn't state anywhere how messages can be logged to the console. After searching on Google, I landed either on a help page for Symfony or questions of people looking for a way to log to the browser console.
但它没有说明如何将消息记录到控制台。在 Google 上搜索后，我登陆了 Symfony 的帮助页面，或者登陆浏览器控制台的人们的问题。
回答by Hirnhamster
The solution is rather simple. Since the example shows a StreamHandlerit's possible to pass in a stream (instead of the path to a file). By default, everything that is echo'ed in PHP is written to php://stdout / php://outputso we can simple use one of those as stream for the StreamHandler:
解决方法相当简单。由于示例显示了 aStreamHandler可以传入流（而不是文件的路径）。默认情况下，在 PHP 中回显的所有内容都会写入php://stdout / php://output，因此我们可以简单地使用其中之一作为以下内容的流StreamHandler：
<?php
use Monolog\Logger;
use Monolog\Handler\StreamHandler;
// create a log channel
$log = new Logger('name');
$log->pushHandler(new StreamHandler('php://stdout', Logger::WARNING)); // <<< uses a stream
// add records to the log
$log->warning('Foo');
$log->error('Bar');
Hope this saves somebody some time :)
希望这可以节省一些时间:)
回答by Justin Tilson
Some extra details if you want to tweak the default message formatting at the same time:
如果您想同时调整默认消息格式，请提供一些额外的详细信息：
use Monolog\Logger;
use Monolog\Formatter\LineFormatter;
use Monolog\Handler\StreamHandler;
$output = "[%datetime%] %channel%.%level_name%: %message%\n";
$formatter = new LineFormatter($output);
$streamHandler = new StreamHandler('php://stdout', Logger::DEBUG);
$streamHandler->setFormatter($formatter);
$logger = new Logger('LoggerName');
$logger->pushHandler($streamHandler);
