Issue #306 - Upgrading HTMLPurifier's Encoder class, so it not to depend on iconv too much. The encoding conversion functions from the multibyte string library might help for dealing with some encodings even without iconv or mbstring.

main/inc/lib/htmlpurifier/library/HTMLPurifier/Encoder.php

@@ -288,6 +288,16 @@ class HTMLPurifier_Encoder
             restore_error_handler();
             return $str;
         }
+        // Added Ivan Tcholakov, 09-SEP-2009.
+        // Next try - encoding conversion related functions form Dokeos LMS,
+        // for some encodings they work even without iconv or mbstring installed.
+        elseif (function_exists('api_is_encoding_supported')) {
+            if (api_is_encoding_supported($encoding)) {
+                $str = api_utf8_encode($str, $encoding);
+                restore_error_handler();
+                return $str;
+            }
+        }
         trigger_error('Encoding not supported, please install iconv', E_USER_ERROR);
     }
 
@@ -323,6 +333,16 @@ class HTMLPurifier_Encoder
             restore_error_handler();
             return $str;
         }
+        // Added Ivan Tcholakov, 09-SEP-2009.
+        // Next try - encoding conversion related functions form Dokeos LMS,
+        // for some encodings they work even without iconv or mbstring installed.
+        elseif (function_exists('api_is_encoding_supported')) {
+            if (api_is_encoding_supported($encoding)) {
+                $str = api_utf8_decode($str, $encoding);
+                restore_error_handler();
+                return $str;
+            }
+        }
         trigger_error('Encoding not supported', E_USER_ERROR);
     }