Output error messages to the log
$level
$msg
Output error messages to the log.
level
Log Level, constants can be used: SWOOLE_LOG_DEBUG, SWOOLE_LOG_TRACE, SWOOLE_LOG_INFO, SWOOLE_LOG_NOTICE, SWOOLE_LOG_WARNING, SWOOLE_LOG_ERROR, SWOOLE_LOG_NONE
SWOOLE_LOG_DEBUG
SWOOLE_LOG_TRACE
SWOOLE_LOG_INFO
SWOOLE_LOG_NOTICE
SWOOLE_LOG_WARNING
SWOOLE_LOG_ERROR
SWOOLE_LOG_NONE
msg
Message content to be written to the log.
No value is returned.