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<?php |
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/** |
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* AppserverIo\Appserver\Core\Utilities\ErrorUtil |
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* |
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* NOTICE OF LICENSE |
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* |
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* This source file is subject to the Open Software License (OSL 3.0) |
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* that is available through the world-wide-web at this URL: |
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* http://opensource.org/licenses/osl-3.0.php |
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* |
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* PHP version 5 |
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* |
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* @author Tim Wagner <[email protected]> |
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* @copyright 2015 TechDivision GmbH <[email protected]> |
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* @license http://opensource.org/licenses/osl-3.0.php Open Software License (OSL 3.0) |
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* @link https://github.com/appserver-io/appserver |
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* @link http://www.appserver.io |
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*/ |
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namespace AppserverIo\Appserver\Core\Utilities; |
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use Psr\Log\LogLevel; |
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// define a custom user exception constant |
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define('E_EXCEPTION', 0); |
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/** |
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* Utility class that providing functionality to handle PHP errors. |
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* |
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* @author Tim Wagner <[email protected]> |
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* @copyright 2015 TechDivision GmbH <[email protected]> |
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* @license http://opensource.org/licenses/osl-3.0.php Open Software License (OSL 3.0) |
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* @link https://github.com/appserver-io/appserver |
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* @link http://www.appserver.io |
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*/ |
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class ErrorUtil |
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{ |
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/** |
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* The singleton instance. |
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* |
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* @var \AppserverIo\Appserver\ServletEngine\Utils\ErrorUtil |
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*/ |
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protected static $instance; |
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/** |
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* Create's and return's the singleton instance. |
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* |
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* @return \AppserverIo\Appserver\ServletEngine\Utils\ErrorUtil The singleton instance |
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*/ |
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public static function singleton() |
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{ |
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// query whether or not the instance has already been created |
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if (ErrorUtil::$instance == null) { |
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ErrorUtil::$instance = new static(); |
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} |
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// return the singleton instance |
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return ErrorUtil::$instance; |
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} |
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/** |
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* Create's a new error instance with the values from the passed array. |
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* |
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* @param array $error The array containing the error information |
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* |
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* @return \AppserverIo\Appserver\Core\Utilities\ErrorInterface The error instance |
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*/ |
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public function fromArray(array $error) |
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{ |
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// extract the array with the error information |
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list ($type, $message, $file, $line) = array_values($error); |
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// initialize and return the error instance |
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return new Error($type, $message, $file, $line); |
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} |
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/** |
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* Create's a new error instance from the passed exception. |
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* |
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* @param \Exception $e The exception to create the error instance from |
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* |
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* @return \AppserverIo\Appserver\Core\Utilities\ErrorInterface The error instance |
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*/ |
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public function fromException(\Exception $e) |
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{ |
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return new Error(E_EXCEPTION, $e->__toString(), $e->getFile(), $e->getLine(), $e->getCode()); |
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} |
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/** |
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* Prepare's the error message for logging/rendering purposes. |
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* |
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* @param \AppserverIo\Appserver\Core\Utilities\ErrorInterface $error The error instance to create the message from |
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* |
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* @return string The error message |
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*/ |
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public function prepareMessage(ErrorInterface $error) |
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{ |
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return sprintf('PHP %s: %s in %s on line %d', $this->mapErrorCode($error), $error->getMessage(), $error->getFile(), $error->getLine()); |
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} |
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/** |
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* Return's the log level for the passed error instance. |
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* |
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* @param \AppserverIo\Appserver\Core\Utilities\ErrorInterface $error The error instance to map the log level for |
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* |
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* @return string |
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*/ |
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public function mapLogLevel(ErrorInterface $error) |
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{ |
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// initialize the log level, default is 'error' |
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$logLevel = LogLevel::ERROR; |
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// query the error type |
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switch ($error->getType()) { |
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case E_WARNING: |
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case E_USER_WARNING: |
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case E_COMPILE_WARNING: |
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case E_RECOVERABLE_ERROR: |
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$logLevel = LogLevel::WARNING; |
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break; |
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case E_NOTICE: |
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case E_USER_NOTICE: |
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case E_STRICT: |
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case E_DEPRECATED: |
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case E_USER_DEPRECATED: |
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$logLevel = LogLevel::NOTICE; |
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break; |
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default: |
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break; |
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} |
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// return the log level |
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return $logLevel; |
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} |
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/** |
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* Return's the a human readable error representation for the passed error instance. |
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* |
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* @param \AppserverIo\Appserver\Core\Utilities\ErrorInterface $error The error instance |
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* |
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* @return string The human readable error representation |
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*/ |
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public function mapErrorCode(ErrorInterface $error) |
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{ |
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// initialize the error representation |
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$wrapped = 'Unknown'; |
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// query the error type |
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switch ($error->getType()) { |
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case E_EXCEPTION: |
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$wrapped = 'Exception'; |
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break; |
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case E_PARSE: |
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case E_ERROR: |
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case E_CORE_ERROR: |
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case E_COMPILE_ERROR: |
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case E_USER_ERROR: |
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$wrapped = 'Fatal Error'; |
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break; |
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case E_WARNING: |
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case E_USER_WARNING: |
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case E_COMPILE_WARNING: |
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case E_RECOVERABLE_ERROR: |
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$wrapped = 'Warning'; |
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break; |
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case E_NOTICE: |
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case E_USER_NOTICE: |
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$wrapped = 'Notice'; |
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break; |
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case E_STRICT: |
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$wrapped = 'Strict'; |
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break; |
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case E_DEPRECATED: |
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case E_USER_DEPRECATED: |
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$wrapped = 'Deprecated'; |
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break; |
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default: |
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break; |
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} |
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// return the human readable error representation |
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return $wrapped; |
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} |
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/** |
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* Query whether or not the passed error type is fatal or not. |
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* |
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* @param integer $type The type to query for |
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* |
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* @return boolean TRUE if the passed type is a fatal error, else FALSE |
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*/ |
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public function isFatal($type) |
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{ |
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return in_array($type, array(E_EXCEPTION, E_PARSE, E_ERROR, E_CORE_ERROR, E_COMPILE_ERROR, E_USER_ERROR)); |
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} |
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} |
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This check compares calls to functions or methods with their respective definitions. If the call has more arguments than are defined, it raises an issue.
If a function is defined several times with a different number of parameters, the check may pick up the wrong definition and report false positives. One codebase where this has been known to happen is Wordpress. Please note the @ignore annotation hint above.