Description:
------------
When the replacement for an entity contains xml tags or another entity these do not get parsed by PHP5. Such constructs are used for example inside the PHP documentation to mark up often used strings like warnings and section titles. This code works in PHP4.

Reproduce code:
---------------
<?php

error_reporting(E_ALL);

$xml = <<<HERE
<!DOCTYPE test [
    <!ENTITY test "<abc>&amp;</abc>">
]>
<test>&test;</test>
HERE;

function startHandler($parser, $name, $attrs) {print("StartHandler Called\n");}
function endHandler($parser, $name) {print("EndHandler Called\n");}
function characterHandler($parser, $data) {echo "Character: $data\n";}

$parser =& xml_parser_create('');
xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, false);

xml_set_element_handler($parser, 'startHandler', 'endHandler');
xml_set_character_data_handler($parser, 'characterHandler');

if (!xml_parse($parser, $xml, true))
    echo xml_error_string($parser);

xml_parser_free($parser);

?>


Expected result:
----------------
StartHandler Called
StartHandler Called
Character: &
EndHandler Called
EndHandler Called

Actual result:
--------------
StartHandler Called
Character: <abc>&amp;</abc>
EndHandler Called