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<?php |
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namespace Jasny\ErrorHandler; |
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use Psr\Log\LoggerInterface; |
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use Psr\Log\LogLevel; |
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use Psr\Log\NullLogger; |
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/** |
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* Trait for logging errors and exceptions |
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*/ |
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trait Logging |
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{ |
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* @var LoggerInterface |
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*/ |
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protected $logger; |
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/** |
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* Set the logger for logging errors |
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* |
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* @param LoggerInterface $logger |
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*/ |
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public function setLogger(LoggerInterface $logger) |
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{ |
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$this->logger = $logger; |
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} |
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/** |
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* Set the logger for logging errors |
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* |
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* @return LoggerInterface |
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*/ |
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public function getLogger() |
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{ |
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if (!isset($this->logger)) { |
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$this->logger = new NullLogger(); |
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} |
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return $this->logger; |
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} |
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/** |
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* Log an error or exception |
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* |
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* @param \Exception|\Error $error |
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*/ |
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public function log($error) |
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{ |
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if ($error instanceof \Error || $error instanceof \ErrorException) { |
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return $this->logError($error); |
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} |
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if ($error instanceof \Exception) { |
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return $this->logException($error); |
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} |
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$message = "Unable to log a " . (is_object($error) ? get_class($error) . ' ' : '') . gettype($error); |
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$this->getLogger()->log(LogLevel::WARNING, $message); |
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} |
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/** |
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* Log an error |
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* |
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* @param \Error|\ErrorException $error |
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*/ |
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protected function logError($error) |
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{ |
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$code = $error instanceof \ErrorException ? $error->getSeverity() : E_ERROR; |
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$level = $this->getLogLevel($code); |
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$message = sprintf('%s: %s at %s line %s', $this->codeToString($code), $error->getMessage(), |
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$error->getFile(), $error->getLine()); |
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$context = [ |
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'error' => $error, |
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'code' => $code, |
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'message' => $error->getMessage(), |
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'file' => $error->getFile(), |
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'line' => $error->getLine() |
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]; |
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$this->getLogger()->log($level, $message, $context); |
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} |
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/** |
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* Log an exception |
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* |
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* @param \Exception $exception |
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*/ |
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protected function logException(\Exception $exception) |
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{ |
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$level = $this->getLogLevel(); |
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$message = sprintf('Uncaught Exception %s: "%s" at %s line %s', get_class($exception), $exception->getMessage(), |
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$exception->getFile(), $exception->getLine()); |
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$context = compact('exception'); |
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$this->getLogger()->log($level, $message, $context); |
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} |
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} |
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This check looks for methods that are used by a trait but not required by it.
To illustrate, let’s look at the following code example
The trait
Idable
provides a methodequalsId
that in turn relies on the methodgetId()
. If this method does not exist on a class mixing in this trait, the method will fail.Adding the
getId()
as an abstract method to the trait will make sure it is available.