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                <?php  | 
            
                            
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                namespace SilverStripe\Auditor;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                require_once BASE_PATH . '/framework/thirdparty/Zend/Log/Writer/Abstract.php';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                require_once BASE_PATH . '/vendor/autoload.php';  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                /**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Alternative monolog writer for SS_Log, for use when auditor module is in operation.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 *  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * Supplied, because there cannot be more than one SS_SysLogWriter has problems writing  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 * to more than one facility at the same time. See this module's readme for more information.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                class MonologSysLogWriter extends \Zend_Log_Writer_Abstract { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @var array Convert Zend_Log level to Monolog level.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    protected $priorities = array(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        \Zend_Log::EMERG  => \Monolog\Logger::EMERGENCY,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        \Zend_Log::ALERT  => \Monolog\Logger::ALERT,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        \Zend_Log::CRIT   => \Monolog\Logger::CRITICAL,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        \Zend_Log::ERR    => \Monolog\Logger::ERROR,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        \Zend_Log::WARN   => \Monolog\Logger::WARNING,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        \Zend_Log::NOTICE => \Monolog\Logger::NOTICE,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        \Zend_Log::INFO   => \Monolog\Logger::INFO,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                        \Zend_Log::DEBUG  => \Monolog\Logger::DEBUG,  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    );  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @var Monolog\Logger  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 */  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	protected $monolog;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	/**  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @param string $ident String identifying the application within the syslog stream.  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	 * @param $facility Syslog facility.  | 
            
            
                                                                                                            
                                                                
            
                                    
            
            
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                	 */  | 
            
            
                                                                        
                            
            
                                    
            
            
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                	public function __construct($ident = 'SilverStripe_log', $facility = LOG_USER) { | 
            
            
                                                                        
                            
            
                                    
            
            
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                		$this->monolog = new \Monolog\Logger('application'); | 
            
                            
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                		$syslog = new \Monolog\Handler\SyslogHandler($ident, $facility, \Monolog\Logger::DEBUG);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		$formatter = new \Monolog\Formatter\LineFormatter("%level_name%: %message% %context%"); | 
            
            
                                                                        
                            
            
                                    
            
            
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                		$syslog->setFormatter($formatter);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                		$this->monolog->pushHandler($syslog);  | 
            
            
                                                                        
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                    static public function factory($config) { | 
            
                            
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                		return new MonologSysLogWriter();  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	protected function _write($event) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		if (!empty($this->priorities[$event['priority']])) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$level = $this->priorities[$event['priority']];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		} else { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$level = \Monolog\Logger::INFO;  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$message = sprintf(  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			'%s (line %s in %s)',  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$event['message']['errstr'],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$event['message']['errline'],  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$event['message']['errfile']  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$context = [];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		if (!empty($event['info'])) { | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                			$context = $event['info'];  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                		$this->monolog->log($level, $message, $context);  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                	}  | 
            
            
                                                                                                            
                            
            
                                    
            
            
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                }  | 
            
            
                                                        
            
                                    
            
            
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The PSR-1: Basic Coding Standard recommends that a file should either introduce new symbols, that is classes, functions, constants or similar, or have side effects. Side effects are anything that executes logic, like for example printing output, changing ini settings or writing to a file.
The idea behind this recommendation is that merely auto-loading a class should not change the state of an application. It also promotes a cleaner style of programming and makes your code less prone to errors, because the logic is not spread out all over the place.
To learn more about the PSR-1, please see the PHP-FIG site on the PSR-1.