function hotpot_xml_tree::xml_value in Quiz 6.5

Same name and namespace in other branches

1. 6.6 includes/moodle/question/format/hotpot/format.php \hotpot_xml_tree::xml_value()

File

includes/moodle/question/format/hotpot/format.php, line 547

Class

hotpot_xml_tree

Code

function xml_value($tags, $more_tags = "[0]['#']") {
  $tags = empty($tags) ? '' : "['" . str_replace(",", "'][0]['#']['", $tags) . "']";
  eval('$value = &$this->xml' . $this->xml_root . $tags . $more_tags . ';');
  if (is_string($value)) {

    // decode angle brackets and ampersands
    $value = strtr($value, array(
      '&#x003C;' => '<',
      '&#x003E;' => '>',
      '&#x0026;' => '&',
    ));

    // remove white space between <table>, <ul|OL|DL> and <OBJECT|EMBED> parts
    // (so it doesn't get converted to <br />)
    $htmltags = '(' . 'TABLE|/?CAPTION|/?COL|/?COLGROUP|/?TBODY|/?TFOOT|/?THEAD|/?TD|/?TH|/?TR' . '|OL|UL|/?LI' . '|DL|/?DT|/?DD' . '|EMBED|OBJECT|APPLET|/?PARAM' . ')';
    $search = '#(<' . $htmltags . '[^>]*' . '>)\\s+' . '(?=' . '<' . ')#is';
    $value = preg_replace($search, '\\1', $value);

    // replace remaining newlines with <br />
    $value = str_replace("\n", '<br />', $value);

    // encode unicode characters as HTML entities
    // (in particular, accented charaters that have not been encoded by HP)
    // multibyte unicode characters can be detected by checking the hex value of the first character
    //    00 - 7F : ascii char (roman alphabet + punctuation)
    //    80 - BF : byte 2, 3 or 4 of a unicode char
    //    C0 - DF : 1st byte of 2-byte char
    //    E0 - EF : 1st byte of 3-byte char
    //    F0 - FF : 1st byte of 4-byte char
    // if the string doesn't match the above, it might be
    //    80 - FF : single-byte, non-ascii char
    $search = '#(' . '[\\xc0-\\xdf][\\x80-\\xbf]' . '|' . '[\\xe0-\\xef][\\x80-\\xbf]{2}' . '|' . '[\\xf0-\\xff][\\x80-\\xbf]{3}' . '|' . '[\\x80-\\xff]' . ')#se';
    $value = preg_replace($search, "hotpot_utf8_to_html_entity('\\1')", $value);
  }
  return $value;
}