Try to refactoring old libxml support (but now it's not supported officially)

README.markdown

@@ -38,6 +38,7 @@ Authors
 Requirements
 ------------
 
+- Recent version of libxml2 >= 2.7.x (version 2.6.32 on Debian Lenny are not supported anymore)
 - PHP >= 5.3.7
 - PHP XML extensions (SimpleXML, DOM...)
 - PHP Sqlite extension

vendor/PicoFeed/Filter.php

@@ -115,16 +115,13 @@ class Filter
         // Workaround for old libxml2 (Debian Lenny)
         if (LIBXML_DOTTED_VERSION === '2.6.32') {
 
-            do {
-                $unique = md5(uniqid());
-            } while(strpos($data, $unique) !== false);
-            $entity_alpha = array('&', '<', '>');
-            $entity_num = array('&', '<', '>');
-            $token = array($unique.'a', $unique.'l', $unique.'r');
-            $data = str_replace($entity_alpha, $token, $data);
-            $data = str_replace($entity_num, $token, $data);
-            $data = html_entity_decode($data, ENT_NOQUOTES|ENT_XHTML, 'UTF-8');
-            $data = str_replace($token, $entity_alpha, $data);
+            $entities = get_html_translation_table(HTML_ENTITIES, ENT_NOQUOTES|ENT_XHTML, 'UTF-8');
+
+            unset($entities['&']);
+            unset($entities['>']);
+            unset($entities['<']);
+
+            $data = str_replace(array_values($entities), array_keys($entities), $data);
         }
 
         // Convert bad formatted documents to XML
@@ -144,13 +141,7 @@ class Filter
         xml_set_element_handler($parser, 'startTag', 'endTag');
         xml_set_character_data_handler($parser, 'dataTag');
         xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, false);
-
-        if (! xml_parse($parser, $this->input, true)) {
-
-            //var_dump($this->input);
-            die(xml_get_current_line_number($parser).'|'.xml_error_string(xml_get_error_code($parser)));
-        }
-
+        xml_parse($parser, $this->input, true); // We ignore parsing error (for old libxml)
         xml_parser_free($parser);
 
         return $this->data;