More SQL command (drop table, drop database)

delete, select & insert upgraded 
More utility function (node to array, arrayToNode)
XMLDB special move command
PHP Unit Test

log.php

@@ -0,0 +1,23 @@
+<?
+class Log {
+
+	protected $logfile;
+	
+    function __construct($filename) {
+		$file 			= $filename;
+		$this->logfile 	= fopen($file, 'a+');
+		$this->message('Starting log');
+    }
+
+    function message($message) {
+		$message 		= '['. date("Y-m-d / H:i:s") . ']'.' - '.$message;
+        $message 		.= "\n";
+        return fwrite( $this->logfile, $message );
+    }
+	
+	function __destruct(){
+		$this->message('Finishing log');
+		return fclose( $this->logfile );
+	}
+}
+