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Latest Version [8.00202205221] Last Updated [May-22-2022]


PHP Manual [The MongoLog class]

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PHP Manual || Miscellaneous

(PECL mongo >=1.2.3)

Logging can be used to get detailed information about what the driver is doing. Logging is disabled by default, but this class allows you to activate specific levels of logging for various parts of the driver. Some examples:


// print every log message possible
MongoLog::setLevel(MongoLog::ALL); // all log levels
MongoLog::setModule(MongoLog::ALL); // all parts of the driver

// print significant events about replica set failover

// print info- and diagnostic-level events for replica sets and connections



By default, MongoLog emits all log messages as PHP notices. Depending on the SAPI you use, messages may be sent to stderr (for CLI) or the web server's error log. If, after configuring MongoLog, log messages are not appearing as expected, ensure that the E_NOTICE bit is included in error_reporting and that display_errors is on.

MongoLog {
/* Constants */
const int NONE = 0 ;
const int ALL = 31 ;
level constants {
const int WARNING = 1 ;
const int INFO = 2 ;
const int FINE = 4 ;
module constants {
const int RS = 1 ;
const int POOL = 1 ;
const int CON = 2 ;
const int IO = 4 ;
const int SERVER = 8 ;
const int PARSE = 16 ;
/* Fields */
private static int callback ;
private static int level ;
private static int module ;
/* Methods */
public static getCallback ( void ) : callable
public static getLevel ( void ) : int
public static getModule ( void ) : int
public static setCallback ( callable $log_function ) : void
public static setLevel ( int $level ) : void
public static setModule ( int $module ) : void

These constants can be used by both MongoLog::setLevel() and MongoLog::setModule().

Log nothing.
Log everything.

These constants can be used by MongoLog::setLevel().

Log events that are somewhat exceptional, but not quite worthy of an actual exception (e.g. recoverable connection errors).
Log events that may be of interest to administrators, but are not particularly noteworthy (e.g. option parsing, authentication steps).
Log most events that the driver performs (e.g. server selection, socket communication). Depending on the module being logged, this can be extremely noisy and is primarily useful for debugging.

These constants can be used by MongoLog::setModule().

Log connection activity. Creating new connections, authentication, pinging, timeouts, etc.
Log traffic to/from the database. Unless your program is trivial, this will create an enormous number of log messages.
Log parsing of the connection string and options when constructing MongoClient.
Previously used to log connection pool activity. This option is now a deprecated alias of MongoLog::RS.
Log replica set activity. Failovers, read preference selection, etc.
Previously used to log server status changes. This option is deprecated in favor of MongoLog::RS.

Version Description
1.3.0 Added MongoLog::CON and deprecated MongoLog::POOL and MongoLog::SERVER.

PHP Manual || Miscellaneous