safe mode for utf8_encodeFN

darcs-hash:20050123182753-9977f-9226687e01f083dbeea7a205db30a6d74ed2eb5f.gz

inc/utf8.php

@@ -11,10 +11,19 @@
  *
  * Slashes are not encoded
  *
+ * When the second parameter is true the string will
+ * be encoded only if non ASCII characters are detected -
+ * This makes it safe to run it multiple times on the
+ * same string (default is true)
+ *
  * @author Andreas Gohr <andi@splitbrain.org>
+ * @see    urlencode
  */
-function utf8_encodeFN($file){
-  $file = rawurlencode($file);
+function utf8_encodeFN($file,$safe=true){
+  if($safe && preg_match('#^[a-zA-Z0-9/_\-.%]+$#',$file)){
+    return $file;
+  }
+  $file = urlencode($file);
   $file = str_replace('%2F','/',$file);
   return $file;
 }
@@ -22,10 +31,13 @@ function utf8_encodeFN($file){
 /**
  * URL-Decode a filename
  *
+ * This is just a wrapper around urldecode
+ *
  * @author Andreas Gohr <andi@splitbrain.org>
+ * @see    urldecode
  */
 function utf8_decodeFN($file){
-  $file = rawurldecode($file);
+  $file = urldecode($file);
   return $file;
 }
 
@@ -52,7 +64,6 @@ function utf8_check($Str) {
  return true;
 }
 
-
 /**
  * This is a unicode aware replacement for strlen()
  *