PHP xml_set_notation_decl_handler() Function

xml_set_notation_decl_handler(parser,handler)

<?php
$parser=xml_parser_create();

function char($parser,$data)
  {
  echo $data;
  }

function not_decl_handler($parser,$not,$base,$sysID,$pubID)
  {
  echo "$not<br />";
  echo "$sysID<br />";
  echo "$pubID<BR />";
  }

xml_set_character_data_handler($parser,"char");
xml_set_notation_decl_handler($parser, "not_decl_handler");
$fp=fopen("test.xml","r");

while ($data=fread($fp,4096))
  {
  xml_parse($parser,$data,feof($fp)) or
  die (sprintf("XML Error: %s at line %d",
  xml_error_string(xml_get_error_code($parser)),
  xml_get_current_line_number($parser)));
  }

xml_parser_free($parser);
?>