[PHP] Re: Parsing PHP variables in XML document

[Ivan Nedialkov]

I comed up with this

<?php
$file = "xmltest2.xml";
$stack = array();
$foo3 = "wddw";
// start_element_handler ( resource parser, string name, array attribs )
function startElement($parser, $name, $attribs)
{
   global $stack;
   $tag=array("name"=>$name,"attrs"=>$attrs); 
   array_push($stack,$tag);
}

// end_element_handler ( resource parser, string name )
function endElement($parser, $name)
{
   global $stack; 
   $stack[count($stack)-2]['children'][] = $stack[count($stack)-1];
   array_pop($stack);
}

// handler ( resource parser, string data )
function characterData($parser, $data)
{
   global $stack,$i;
   
   eval("\$data = \"$data\";"); 
        
   if(trim($data))
   {  
        $stack[count($stack)-1]['data']=$data;   
   }
}

// handler ( resource parser, string target, string data )
function PIHandler($parser, $target, $data)
{
   if ((strtolower($target)) == "php") {
                global $parser_file;
          eval($data);        
   }
}

function defaultHandler($parser, $data)
{

}

function externalEntityRefHandler($parser, $openEntityNames, $base,
$systemId,
                                 $publicId) {
   if ($systemId) {
       if (!list($parser, $fp) = new_xml_parser($systemId)) {
           printf("Could not open entity %s at %s\n", $openEntityNames,
                   $systemId);
           return false;
       }
       while ($data = fread($fp, 4096)) {
           if (!xml_parse($parser, $data, feof($fp))) {
               printf("XML error: %s at line %d while parsing entity %s
\n",
                       xml_error_string(xml_get_error_code($parser)),
                       xml_get_current_line_number($parser),
$openEntityNames);
               xml_parser_free($parser);
               return false;
           }
       }
       xml_parser_free($parser);
       return true;
   }
   return false;
}



function new_xml_parser($file)
{
   global $parser_file;
        $xml_parser = xml_parser_create();
   
   xml_parser_set_option($xml_parser, XML_OPTION_CASE_FOLDING, 0);
   
   xml_set_processing_instruction_handler($xml_parser, "PIHandler");
   
   xml_set_element_handler($xml_parser, "startElement", "endElement");
   
   xml_set_character_data_handler($xml_parser, "characterData"); 
   
   xml_set_default_handler($xml_parser, "defaultHandler");
   
   xml_set_external_entity_ref_handler($xml_parser,
"externalEntityRefHandler");
  
   if (!($fp = @fopen($file, "r"))) {
       return false;
   }
   if (!is_array($parser_file)) {
       settype($parser_file, "array");
   }
   $parser_file[$xml_parser] = $file;
   return array($xml_parser, $fp);
}


if (!(list($xml_parser, $fp) = new_xml_parser($file))) {
   die("could not open XML input");
}

//ERROR
while ($data = fread($fp, 4096)) {
   if (!xml_parse($xml_parser, $data, feof($fp))) {
       die(sprintf("XML error: %s at line %d\n",
                   xml_error_string(xml_get_error_code($xml_parser)),
                   xml_get_current_line_number($xml_parser)));
   }
}
//END
xml_parser_free($xml_parser);

print("<pre>\n");
print_r($stack);
print("</pre>\n");


?>

it evaluates php code. But when I use 

eval("\$data = \"$data\";");

the strings in the $data e.g. ('sth $foo other $foo1')do not appear. I
think the problem is that it thinks they are undefined. 

Here is the xml file

<?xml version="1.0"?>
<!DOCTYPE foo [
<!ENTITY testEnt "test entity">
]>
<document>
<foo>
   <?php $foo3='555'; echo "Some text";  ?>
</foo>
<foo>
hi 
</foo>
<foo>foo $foo3 foo
</foo>
</document>

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