update example

example.php

@@ -8,8 +8,24 @@ require_once 'Logger.php';
 /* Define log path and log filename */
 $logger = Logger::get_logger('./logs', 'my-log');
 $logger->log("normal log message");
-$logger->log("log with addtional arguments: %s, %s", "msg1", "msg2");
+$logger->log("normal log with addtional arguments: %s, %s", "msg1", "msg2");
 
 /* Dump */
 $data = array(1,2,3);
 $logger->dump($data, "data"); // or just: $logger->dump($data);
+
+/* Log Debug */
+$logger->debug("log debug");
+$logger->debug("log debug with addtional arguments: %s, %s", "msg1", "msg2");
+
+/* Log Info */
+$logger->info("log info");
+$logger->info("log info with addtional arguments: %s, %s", "msg1", "msg2");
+
+/* Log Warning */
+$logger->warning("log warning");
+$logger->warning("log warning with addtional arguments: %s, %s", "msg1", "msg2");
+
+/* Log Error */
+$logger->error("log error");
+$logger->error("log error with addtional arguments: %s, %s", "msg1", "msg2");