PHP PKPString::utf8_strip_ascii_ctrl方法代码示例

 /**
  * Sanitize a variable.
  * Removes leading and trailing whitespace, normalizes all characters to UTF-8.
  * @param $var string
  * @return string
  */
 static function cleanVar($var)
 {
     // only normalize strings that are not UTF-8 already, and when the system is using UTF-8
     if (Config::getVar('i18n', 'charset_normalization') == 'On' && strtolower_codesafe(Config::getVar('i18n', 'client_charset')) == 'utf-8' && !PKPString::utf8_is_valid($var)) {
         $var = PKPString::utf8_normalize($var);
         // convert HTML entities into valid UTF-8 characters (do not transcode)
         $var = html_entity_decode($var, ENT_COMPAT, 'UTF-8');
         // strip any invalid UTF-8 sequences
         $var = PKPString::utf8_bad_strip($var);
         $var = htmlspecialchars($var, ENT_NOQUOTES, 'UTF-8', false);
     }
     // strip any invalid ASCII control characters
     $var = PKPString::utf8_strip_ascii_ctrl($var);
     return trim($var);
 }

 /**
  * Parse an XML file using the specified handler.
  * If no handler has been specified, XMLParserDOMHandler is used by default, returning a tree structure representing the document.
  * @param $file string full path to the XML file
  * @param $dataCallback mixed Optional callback for data handling: function dataCallback($operation, $wrapper, $data = null)
  * @return object actual return type depends on the handler
  */
 function &parse($file, $dataCallback = null)
 {
     $parser =& $this->createParser();
     if (!isset($this->handler)) {
         // Use default handler for parsing
         $handler = new XMLParserDOMHandler();
         $this->setHandler($handler);
     }
     xml_set_object($parser, $this->handler);
     xml_set_element_handler($parser, "startElement", "endElement");
     xml_set_character_data_handler($parser, "characterData");
     import('lib.pkp.classes.file.FileWrapper');
     $wrapper =& FileWrapper::wrapper($file);
     // Handle responses of various types
     while (true) {
         $newWrapper = $wrapper->open();
         if (is_object($newWrapper)) {
             // Follow a redirect
             unset($wrapper);
             $wrapper =& $newWrapper;
             unset($newWrapper);
         } elseif (!$newWrapper) {
             // Could not open resource -- error
             $returner = false;
             return $returner;
         } else {
             // OK, we've found the end result
             break;
         }
     }
     if (!$wrapper) {
         $result = false;
         return $result;
     }
     if ($dataCallback) {
         call_user_func($dataCallback, 'open', $wrapper);
     }
     while (!$wrapper->eof() && ($data = $wrapper->read()) !== false) {
         // if the string contains non-UTF8 characters, convert it to UTF-8 for parsing
         if (Config::getVar('i18n', 'charset_normalization') == 'On' && !PKPString::utf8_compliant($data)) {
             $utf8_last = PKPString::substr($data, PKPString::strlen($data) - 1);
             // if the string ends in a "bad" UTF-8 character, maybe it's truncated
             while (!$wrapper->eof() && PKPString::utf8_bad_find($utf8_last) === 0) {
                 // read another chunk of data
                 $data .= $wrapper->read();
                 $utf8_last = PKPString::substr($data, PKPString::strlen($data) - 1);
             }
             $data = PKPString::utf8_normalize($data);
             // strip any invalid UTF-8 sequences
             $data = PKPString::utf8_bad_strip($data);
             // convert named entities to numeric entities
             $data = strtr($data, PKPString::getHTMLEntities());
         }
         // strip any invalid ASCII control characters
         $data = PKPString::utf8_strip_ascii_ctrl($data);
         if ($dataCallback) {
             call_user_func($dataCallback, 'parse', $wrapper, $data);
         }
         if (!xml_parse($parser, $data, $wrapper->eof())) {
             $this->addError(xml_error_string(xml_get_error_code($parser)));
         }
     }
     if ($dataCallback) {
         call_user_func($dataCallback, 'close', $wrapper);
     }
     $wrapper->close();
     $result = $this->handler->getResult();
     $this->destroyParser($parser);
     if (isset($handler)) {
         $handler->destroy();
     }
     return $result;
 }