demo/demo-consumer/config/log4php.xml

<configuration xmlns="http://logging.apache.org/log4php/">
    <appender name="myAppender" class="LoggerAppenderFile">
        <param name="file" value="/tmp/consumer.log" />
        <layout class="LoggerLayoutPattern">
            <param name="conversionPattern" value="[%date{Y-m-d H:i:s,u}][%level][%logger][%line] %message%newline" />
        </layout>
    </appender>
    <root>
        <level value="DEBUG" />
        <appender_ref ref="myAppender" />
    </root>
</configuration>