test changes

libraries/xlsxwriter.class.php

@@ -85,6 +85,24 @@ Class XLSXWriter
 		return $string;
 	}
 
+	public function sanitize_filename($filename) //http://msdn.microsoft.com/en-us/library/aa365247%28VS.85%29.aspx
+	{
+		$nonprinting = array_map('chr', range(0,31));
+		$invalid_chars = array('<', '>', '?', '"', ':', '|', '\\', '/', '*', '&');
+		$all_invalids = array_merge($nonprinting,$invalid_chars);
+		return str_replace($all_invalids, "", $filename);
+	}
+	//------------------------------------------------------------------
+	public function sanitize_sheetname($sheetname) 
+	{
+		static $badchars  = '\\/?*:[]';
+		static $goodchars = '        ';
+		$sheetname = strtr($sheetname, $badchars, $goodchars);
+		$sheetname = substr($sheetname, 0, 31);
+		$sheetname = trim(trim(trim($sheetname),"'"));//trim before and after trimming single quotes
+		return !empty($sheetname) ? $sheetname : 'Sheet'.((rand()%900)+100);
+	}	
+
 	public function writeToFile($filename)
 	{
 		@unlink($filename);//if the zip already exists, overwrite it