diff --git a/logger.php b/logger.php
index cb36821..4a53181 100644
--- a/logger.php
+++ b/logger.php
@@ -141,6 +141,8 @@ class logger
       $logsType = $this->logtype;
     if (in_array ("display", $logsType))
       $this->logdisplay ($msg, $priority);
+    if (in_array ("stderr", $logsType))
+      $this->logstderr ($msg, $priority);
     if (in_array ("file", $logsType))
       $this->logfile ($msg, $priority);
     if (in_array ("syslog", $logsType))
@@ -197,6 +199,22 @@ class logger
     echo "\n";
   }
 
+  /** Log $message on stderr with adding date. Add the HTML flags if not in CLI.
+      @param string $message Message to log
+      @param integer|null $priority Priority to use */
+  private function logstderr ($message, $priority)
+  {
+    if (php_sapi_name () !== "cli")
+      file_put_contents("php://stderr", "<tt>");
+    ini_set ("date.timezone", $this->timezone);
+    $message = date ("Y/m/d H:i:s")." [".$this->priorities[$priority]."] ".
+               $message;
+    file_put_contents("php://stderr", "$message");
+    if (php_sapi_name () !== "cli")
+      file_put_contents("php://stderr", "</tt><br/>");
+    file_put_contents("php://stderr", "\n");
+  }
+
   /** Log $message on syslog
       @param string $message Message to log
       @param integer|null $priority Priority to use */