function _decode_entities in Drupal 4

Same name and namespace in other branches

1. 5 includes/unicode.inc \_decode_entities()
2. 6 includes/unicode.inc \_decode_entities()

Helper function for decode_entities

File

includes/unicode.inc, line 296

Code

function _decode_entities($prefix, $codepoint, $original, &$table, &$exclude) {

  // Named entity
  if (!$prefix) {
    if (isset($table[$original])) {
      return $table[$original];
    }
    else {
      return $original;
    }
  }

  // Hexadecimal numerical entity
  if ($prefix == '#x') {
    $codepoint = base_convert($codepoint, 16, 10);
  }
  else {
    $codepoint = preg_replace('/^0+/', '', $codepoint);
  }

  // Encode codepoint as UTF-8 bytes
  if ($codepoint < 0x80) {
    $str = chr($codepoint);
  }
  else {
    if ($codepoint < 0x800) {
      $str = chr(0xc0 | $codepoint >> 6) . chr(0x80 | $codepoint & 0x3f);
    }
    else {
      if ($codepoint < 0x10000) {
        $str = chr(0xe0 | $codepoint >> 12) . chr(0x80 | $codepoint >> 6 & 0x3f) . chr(0x80 | $codepoint & 0x3f);
      }
      else {
        if ($codepoint < 0x200000) {
          $str = chr(0xf0 | $codepoint >> 18) . chr(0x80 | $codepoint >> 12 & 0x3f) . chr(0x80 | $codepoint >> 6 & 0x3f) . chr(0x80 | $codepoint & 0x3f);
        }
      }
    }
  }

  // Check for excluded characters
  if (in_array($str, $exclude)) {
    return $original;
  }
  else {
    return $str;
  }
}