* $filter = new ezcLogFilter(); * $filter->severity = ezcLog::INFO | ezcLog::NOTICE | ezcLog::WARNING | ezcLog::ERROR | ezcLog::FATAL; * * $log = ezcLog::getInstance(); * $log->getMapper()->appendRule( new ezcLogFilterRule( $filter, new ezcLogUnixFileWriter( "/tmp/logs/", "error.log" ), true ) ); * * * The log messages with the severity: INFO, NOTICE, WARNING, ERROR, and FATAL will * be written to the file: "/tmp/logs/error.log". See {@link ezcLogUnixFileWriter} for * the description of the file format. * * The following example will write the audit trails to the database: * * $filter = new ezcLogFilter(); * $filter->severity = ezcLog::SUCCESS_AUDIT | ezcLog::FAILED_AUDIT; * * $log = ezcLog::getInstance(); * $log->getMapper()->appendRule( new ezcLogFilterRule( $filter, new ezcLogDatabaseWriter( "audits" ), true ) ); * * * The audit trails will be stored in the table "audits". See {@link ezcLogDatabaseWriter} * for creating the appropriate tables and setting up the database. See the {@link ezcLogFilter} * for more details. * * Use the {@link log()} method to log messages at the specified writers. This * method expects a: * - Message, contains a single log message. * - Severity, indicates the level of importance. * - Extra attributes (optional). * * Although the interpretation of the severity levels are up to the programmer, * the most common interpretations are: * - DEBUG: Records information about the progress in the program and references * source code functions. Knowledge of the source code is needed to interpret * this log message. * - INFO: Informative logging at a detailed level. This logging method produces a * high level of logging, which is unmanageable on a production environment. * Usually INFO logging is only enabled to help by analysing a problem. * - NOTICE: Informative logging at a lower detail level than INFO logging. * Only major stages are recorded and is useful to monitor a low volume system. * - WARNING: Something unexpected happened, but did not cause any loss of service. * - ERROR: An error occured, which may cause partial loss of service. Usually the * system can recover. * - FATAL: An serious error occured and the system is unlikely to recover. * - SUCCESS_AUDIT: Informative logging about a successful completion of work by * a module completed. Useful to trace system changes directly or indirectly * done by a user. * - FAILED_AUDIT: Informative logging about an action from a module * with a negative result. A failed login will most likely added to this severity. * * The next example logs a fatal error and has no extra attributes: * * ezcLog::getInstance()->log( "Cannot open ini file: <$file>", ezcLog::FATAL ); * * * The log message will get by default the category and source: "default". The * default values can be modified by changing, respectively, the properties * $category and $source. * * An example of a Payment checker is as follows: * * // The start of the Payment module. * $log = ezcLog::getInstance(); * $log->source = "Payment checker"; // Change the default source. * * $log->log( "Checking the received amount", ezcLog::INFO, array( "shop" ) ); * * if ( !$eZPay->receivedAmount() != $requiredAmount ) * { * $log->log( "Received amount: <".$eZPay->receivedAmount()."> expected: <$requiredAmount>.", * ezcLog::DEBUG, * array( "category" => "shop", "file" => __FILE__, "line" => __LINE ) * ); * * $log->log( "Insufficient amount.", * ezcLog::FAILED_AUDIT, * array( "UserName" => getCurrentUser(), category => "Payment" ) * ) * * $log->log( "Rollback amount not implemented, cannot recover, ezcLog::FATAL ); * exit(); * } * * * Sometimes information repeats for specific severities or categories. For example that * for the audit trails an username is required. Convenience methods like: * {@link setSeverityAttributes()} and {@link setSourceAttributes()} exist to append * information automatically to the log message. * * The ezcLog class provides a {@link trigger_error()} log handler: {@link ezcLog::logHandler()}. * Using the trigger_error method makes your code less Log package dependent and * produces less overhead when logging is disabled. * * See the {@link ezcLog::logHandler()} method for more information about how to set up the * trigger_error functionality. * * See the {@link ezcDebug} package for more detailed information about writing DEBUG * messages. * * @property string $source * Definition of the global location where the log message comes * from. Some examples are: module, source file, extension, etc. The * source depends also on the severity of the message. For DEBUG * messages is the source file more important whereas for a FATAL * error the module is sufficient. * @property string $category * Definition of the message group. Again the category is related to * the severity. The non audit trails can group the log messages * like: Database (or even the database types), Templates, etc. For * audit trails it makes much sense to categorize the actions. For * example: security, modified content, published content, shop, etc. * * @package EventLog * @version 1.2beta1 * @mainclass */ class ezcLog { /** * Debug severity constant. */ const DEBUG = 1; /** * Success audit severity constant. */ const SUCCESS_AUDIT = 2; /** * Failed audit severity constant. */ const FAILED_AUDIT = 4; /** * Info severity constant. */ const INFO = 8; /** * Notice severity constant. */ const NOTICE = 16; /** * Warning severity constant. */ const WARNING = 32; /** * Error severity constant. */ const ERROR = 64; /** * Fatal severity constant. */ const FATAL = 128; /** * Holds the properties of this class. * * @var array(string=>mixed) */ private $properties = array(); /** * Contains the logic of mapping an incoming log message to the writer. * * @var ezcLogFilterSet */ protected $writers; /** * Stores the attributes from the eventTypes and eventSources. * * $var ezcLogContext */ protected $context; /** * Stores the instance of this class. * * @var ezcLog */ private static $instance = null; /** * Stores the setting whether writer exceptions should be thrown. * * @var bool */ private $throwWriterExceptions = true; /** * Constructs an empty ezcLog instance. * * This constructor is private as this class should be used as a * singleton. Use the getInstance() method instead to get an ezcLog instance. */ private function __construct() { $this->reset(); } /** * Returns the instance of the class. * * @return ezcLog */ public static function getInstance() { if ( is_null( self::$instance ) ) { self::$instance = new self(); ezcBaseInit::fetchConfig( 'ezcInitLog', self::$instance ); } return self::$instance; } /** * Sets the property $name to $value. * * @throws ezcBasePropertyNotFoundException * If the property $name does not exist * @param string $name * @param mixed $value * @ignore */ public function __set( $name, $value ) { switch ( $name ) { case "source": case "category": $this->properties[$name] = $value; return; } throw new ezcBasePropertyNotFoundException( $name ); } /** * Returns the property $name. * * @throws ezcBasePropertyNotFoundException * If the property $name does not exist * @param string $name * @return mixed * @ignore */ public function __get( $name ) { switch ( $name ) { case "source": case "category": return $this->properties[$name]; } throw new ezcBasePropertyNotFoundException( $name ); } /** * Returns true if the property $name is set, otherwise false. * * @param string $name * @return bool * @ignore */ public function __isset( $name ) { switch ( $name ) { case 'source': case 'category': return isset( $this->properties[$name] ); default: return false; } } /** * Resets the log instance to its initial state. * * All sourceAttributes, severityAttributes, and writers will be removed. * The default source and category are also reset. */ public function reset() { $this->writers = new ezcLogFilterSet(); $this->context = new ezcLogContext(); $this->setDefaults(); } /** * Sets the given ezcLogMapper $mapper as the log message to writer map. * * By default the ezcLogFilterSet is the default writer map. The default * ezcLogMapper can be replaced with this method. * * @param ezcLogMapper $mapper */ public function setMapper( ezcLogMapper $mapper ) { $this->writers = $mapper; } /** * Returns an instance of the current ezcLogMapper. * * return ezcLogMapper */ public function getMapper() { return $this->writers; } /** * Sets the source and category defaults to "default". */ protected function setDefaults() { $this->properties['source'] = "default"; $this->properties['category'] = "default"; } /** * Enables or disables writer exceptions with the boolean $enable. * * Typically you want to have exceptions enabled while developing your application * in order to catch potential problems. A live server however, should not throw * a deadly exception when a relatively unimportant debug message could not be written to * the log file. For these setups you can disable writer exceptions. * * @param bool $enable */ public function throwWriterExceptions( $enable ) { $this->throwWriterExceptions = $enable; } /** * Write the message $message with additional information to one or multiple log writers. * * The log message $message, severity $severity, and extra attributes $attributes are sent to * the writers that matches with the {@link ezcLogFilter}. The following parameters are * taken in the comparation with the ezcLogFilter: * - $severity: the severity of the log message. * - $attributes[ "source" ]: the source from where the log message comes. * - $attributes[ "category" ]: the category of the log message. * * See for more information about filter matching the classes {@link ezcLog} and * {@link ezcLogFilter}. * * The message $message describes what happened. The severity $severity is one of the ezcLog constants: * - DEBUG: Records information about the progress in the program and references * source code functions. Knowledge of the source code is needed to interpret * this log message. * - INFO: Informative logging at a detailed level. This logging method produces a * high level of logging, which is unmanageable on a production environment. * Usually INFO logging is only enabled to help by analysing a problem. * - NOTICE: Informative logging at a lower detail level than INFO logging. * Only major stages are recorded and is useful to monitor a low volume system. * - WARNING: Something unexpected happened, but did not cause any loss of service. * - ERROR: An error occured, which may cause partial loss of service. Usually the * system can recover. * - FATAL: An serious error occured and the system is unlikely to recover. * - SUCCESS_AUDIT: Informative logging about a successful completion of work by * a module completed. Useful to trace system changes directly or indirectly * done by a user. * - FAILED_AUDIT: Informative logging about an action from a module * with a negative result. A failed login will most likely added to this severity. * * The attributes array $attributes can have one or multiple attributes that will * be added to the log. If source and category are given, they will override the default * source or category given as property to this object. Further more it is up to the * application what to include in the log. It may be useful to add the * file and linenumber to the attributes array. Use the magic PHP constants: {@link __FILE__} * and {@link __LINE__} for this purpose. The next example adds an warning to the log. * * * ezcLog::getInstance()->source = "templateEngine"; // Set the default source. * ezcLog::getInstance()->log( "ezcPersistentObject <$obj> does not exist.", * ezcLog::WARNING, * array( "category" => "Database", "line" => __LINE__, "file" => __FILE__, "code" => 123 ) * ); * * * The methods {@link setSeverityAttributes()} and {@link setSourceAttributes()} can automatically * add attributes to log messages based on, respectively, the severity and source. * * See also {@link logHandler()} on how to use {@link trigger_error()} to write log messages. * * @throws ezcLogWriterException if {@link throwWriterExceptions} are enabled and a log entry * could not be written. * * @param string $message * @param int $severity One of the following severity constants: * DEBUG, SUCCES_AUDIT, FAIL_AUDIT, INFO, NOTICE, WARNING, ERROR, or FATAL. * @param array(string=>string) $attributes */ public function log( $message, $severity, array $attributes = array() ) { $source = ( isset( $attributes["source"] ) ? $attributes["source"] : $this->properties["source"] ); $category = ( isset( $attributes["category"] ) ? $attributes["category"] : $this->properties["category"] ); unset( $attributes["source"] ); unset( $attributes["category"] ); $attributes = array_merge( $this->context->getContext( $severity, $source ), $attributes ); $writers = $this->writers->get( $severity, $source, $category ); foreach ( $writers as $writer ) { try { $writer->writeLogMessage( $message, $severity, $source, $category, $attributes ); } catch ( ezcLogWriterException $e ) { if ( $this->throwWriterExceptions ) { throw $e; } } } } /** * Sets the attributes $attributes for a group of severities $severityMask. * * The severities are specified with a bit mask. These attributes will be * added to the log message when the log severity is the same as specified * here. * * Example: * * ezcLog::getInstance()->setSeverityAttributes( * ezcLog::SUCCESS_AUDIT | ezcLog::FAILED_AUDIT * array( "username" => "Jan K. Doodle" ) * ); * * * Every log message that has the severity SUCCESS_AUDIT or FAILED_AUDIT * includes the user name: "Jan K. Doodle". * * @param integer $severityMask Multiple severities are specified with a logic-or. * @param array(string=>string) $attributes */ public function setSeverityAttributes( $severityMask, $attributes ) { $this->context->setSeverityContext( $severityMask, $attributes ); } /** * Sets the attributes $attributes for a group of sources $sources. * * The sources are specified in an array. These attributes will be added to the * log message when it matches with the given $sources. * * Example: * * ezcLog::getInstance()->setSourceAttributes( * array( "Paynet", "Bibit", "Paypal" ), * array( "MerchantID" => $merchantID ) * ); * * * Every log message that comes from the payment module: Paynet, Bibit, or Paypal * includes the Merchant ID. * * @param array(string) $sources * @param array(string => string) $attributes */ public function setSourceAttributes ( $sources, $attributes ) { $this->context->setSourceContext( $sources, $attributes ); } /** * This method can be set as error_handler to log using {@link trigger_error()}. * * This method can be assigned with the {@link set_error_handler()} to handle the * trigger_error calls. This method will get the log instance and forward the * message. But includes the following information: * - The file and linenumber are automatically added. * - Source and category can be 'encoded' in the message. * * The message format is as follows: *
     * [ source, category ] Message 
     * 
* * When one name is given between the brackets, the category will be set and the message has a default source: *
     * [ category ] Message
     * 
* * Without any names between the brackets, the default category and source are used: *
     * Message
     * 
* * The following example creates manually an error handler and forwards the * ERROR, WARNING and NOTICE severities. * * function myLogHandler($errno, $errstr, $errfile, $errline) * { * switch ($errno) * { * case E_USER_ERROR: * case E_USER_WARNING: * case E_USER_NOTICE: * if ( $loggingEnabled ) * { // Forward the message to the log handler. * ezcLog::LogHandler( $errno, $errstr, $errfile, $errline ); * } * break; * * default: * print( "$errstr in $errfile on line $errline\n" ); * break; * } * } * * // Register myLogHandler * set_error_handler( "myLogHandler" ); * * // Write an warning to the log. * trigger_error( "[paynet, transaction] Didn't get a callback from the Paynet service", E_USER_WARNING ); * * // Add a notice. * trigger_error( "Getting paynet status information", E_USER_NOTICE ); * * * * Notice that the ezcLog component is not loaded at all when the logging is disabled. * * @param int $errno * @param int $errstr * @param string $errfile * @param int $errline */ public static function logHandler( $errno, $errstr, $errfile, $errline ) { $log = ezcLog::getInstance(); $lm = new ezcLogMessage( $errstr, $errno, $log->source, $log->category ); $log->log( $lm->message, $lm->severity, array( "source" => $lm->source, "category" => $lm->category, "file" => $errfile, "line" => $errline ) ); } /** * Translates the severity constant to a string and returns this. * * Null is returned when the severity constant is invalid. * * @param int $severity * @return string */ public static function translateSeverityName( $severity ) { switch ( $severity ) { case self::DEBUG: return "Debug"; case self::SUCCESS_AUDIT: return "Success audit"; case self::FAILED_AUDIT: return "Failed audit"; case self::INFO: return "Info"; case self::NOTICE: return "Notice"; case self::WARNING: return "Warning"; case self::ERROR: return "Error"; case self::FATAL: return "Fatal"; default: return null; } } } ?>