? common.inc.save
? file-save-data.patch
Index: file.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/file.inc,v
retrieving revision 1.88
diff -u -r1.88 file.inc
--- file.inc	11 Dec 2006 16:45:17 -0000	1.88
+++ file.inc	27 Dec 2006 16:37:09 -0000
@@ -509,7 +509,8 @@
 }
 
 /**
- * Save a string to the specified destination.
+ * Save a string to the specified destination, or a temporary location if
+ * no destination was given.
  *
  * @param $data A string containing the contents of the file.
  * @param $dest A string containing the destination location.
@@ -520,7 +521,7 @@
  *
  * @return A string containing the resulting filename or 0 on error
  */
-function file_save_data($data, $dest, $replace = FILE_EXISTS_RENAME) {
+function file_save_data($data, $dest = '', $replace = FILE_EXISTS_RENAME) {
   $temp = file_directory_temp();
   $file = tempnam($temp, 'file');
   if (!$fp = fopen($file, 'wb')) {
@@ -530,8 +531,10 @@
   fwrite($fp, $data);
   fclose($fp);
 
-  if (!file_move($file, $dest, $replace)) {
-    return 0;
+  if (!empty($dest)) {
+    if (!file_move($file, $dest, $replace)) {
+      return 0;
+    }
   }
 
   return $file;