diff --git a/logger.php b/logger.php
new file mode 100644
index 0000000..800025b
--- /dev/null
+++ b/logger.php
@@ -0,0 +1,110 @@
+<?php
+class logger
+{
+  /* The logger class can be used with :
+     $d=new logger;
+     $d->timezone = "Europe/Paris";
+     $d->logtype="display|file";
+     $d->logfile="/tmp/toto.log";
+     $d->logwrite ("Super log default");
+     $d->logwrite ("Super log DEBUG", $d::DEBUG);
+     $d->logwrite ("Super log NOTICE", $d::NOTICE); */
+  // TODO : Add SQL support
+  public $logtype = "display"; // display, file, syslog
+                               // can be merged with a pipe : "display|syslog"
+  public $logfile = FALSE;
+  public $timezone = "UTC";
+  public $loglevelmin = LOG_NOTICE;
+ // See http://fr2.php.net/manual/en/function.openlog.php for $syslogFacility
+  public $syslogFacility = LOG_USER;
+  public $syslogPrefix = FALSE;
+
+  /* Priorities :
+  LOG_EMERG   system is unusable
+  LOG_ALERT   action must be taken immediately
+  LOG_CRIT    critical conditions
+  LOG_ERR     error conditions
+  LOG_WARNING warning conditions
+  LOG_NOTICE  normal, but significant, condition
+  LOG_INFO    informational message
+  LOG_DEBUG   debug-level message */
+  private $priorities = array (LOG_EMERG   => "EMERG",
+                               LOG_ALERT   => "ALERT",
+                               LOG_CRIT    => "CRITICAL",
+                               LOG_ERR     => "ERROR",
+                               LOG_WARNING => "WARNING",
+                               LOG_NOTICE  => "NOTICE",
+                               LOG_INFO    => "INFO",
+                               LOG_DEBUG   => "DEBUG"); 
+
+  /** Store a new message log in the log manager defined by $logtype */
+  public function log ($message, $priority=LOG_NOTICE)
+  {
+    if ($this->loglevelmin < $priority)
+      return;
+    $back = reset (debug_backtrace());
+    $message .= " [".basename ($back["file"]).":".$back["line"]."]";
+    $logsType = explode ("|", $this->logtype);
+    if (in_array ("display", $logsType))
+      $this->logdisplay ($message, $priority);
+    if (in_array ("file", $logsType))
+      $this->logfile ($message, $priority);
+    if (in_array ("syslog", $logsType))
+      $this->logsyslog ($message, $priority);
+  }
+
+  /** Log $message on file */
+  private function logfile ($message, $priority)
+  {
+    if ($this->logfile === FALSE)
+      throw new Exception ("Undefined file where logging");
+    if (!file_exists ($this->logfile))
+    {
+      if (! is_dir (dirname ($this->logfile)))
+        throw new Exception ("You must create the ".dirname ($this->logfile).
+                             "directory");
+      if (! is_writable (dirname ($this->logfile)))
+        throw new Exception ("The directory ".dirname ($this->logfile)." must"
+                            ." be writable to create log file");
+    }
+
+    if (!is_writable ($this->logfile))
+    {
+      if (function_exists ("posix_geteuid"))
+        $user = posix_geteuid ();
+      elseif (getenv('USERNAME') !== FALSE)
+        $user = getenv('USERNAME');
+      else
+        $user = "";
+      throw new Exception ("Logfile $this->logfile is not writable for user ".
+                           $user);
+    }
+
+    ini_set ("date.timezone", $this->timezone);
+    $message = date ("Y/m/d H:i:s")." [".$this->priorities[$priority]."] ".
+               $message."\n";
+    file_put_contents ($this->logfile, $message, FILE_APPEND);
+  }
+
+  /** Log $message on screen with adding date. Add the HTML flags if not in CLI
+    */
+  private function logdisplay ($message, $priority)
+  {
+    if (php_sapi_name () !== "cli")
+      echo "<tt>";
+    ini_set ("date.timezone", $this->timezone);
+    $message = date ("Y/m/d H:i:s")." [".$this->priorities[$priority]."] ".
+               $message;
+    echo "$message";
+    if (php_sapi_name () !== "cli")
+      echo "</tt><br/>";
+    echo "\n";
+  }
+
+  /** Log $message on syslog */
+  private function logsyslog ($message, $priority)
+  {
+    openlog ($this->syslogPrefix, NULL, $this->syslogFacility);
+    syslog ($priority, $message);
+  }
+}