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<?php namespace Box\Spout\Reader\Wrapper; use Box\Spout\Reader\Exception\XMLProcessingException; /** * Trait XMLInternalErrorsHelper */ trait XMLInternalErrorsHelper { /** @var bool Stores whether XML errors were initially stored internally - used to reset */ protected $initialUseInternalErrorsValue; /** * To avoid displaying lots of warning/error messages on screen, * stores errors internally instead. * * @return void */ protected function useXMLInternalErrors() { \libxml_clear_errors(); $this->initialUseInternalErrorsValue = \libxml_use_internal_errors(true); } /** * Throws an XMLProcessingException if an error occured. * It also always resets the "libxml_use_internal_errors" setting back to its initial value. * * @throws \Box\Spout\Reader\Exception\XMLProcessingException * @return void */ protected function resetXMLInternalErrorsSettingAndThrowIfXMLErrorOccured() { if ($this->hasXMLErrorOccured()) { $this->resetXMLInternalErrorsSetting(); throw new XMLProcessingException($this->getLastXMLErrorMessage()); } $this->resetXMLInternalErrorsSetting(); } /** * Returns whether the a XML error has occured since the last time errors were cleared. * * @return bool TRUE if an error occured, FALSE otherwise */ private function hasXMLErrorOccured() { return (\libxml_get_last_error() !== false); } /** * Returns the error message for the last XML error that occured. * @see libxml_get_last_error * * @return string|null Last XML error message or null if no error */ private function getLastXMLErrorMessage() { $errorMessage = null; $error = \libxml_get_last_error(); if ($error !== false) { $errorMessage = \trim($error->message); } return $errorMessage; } /** * @return void */ protected function resetXMLInternalErrorsSetting() { \libxml_use_internal_errors($this->initialUseInternalErrorsValue); } }
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