public function escapeJavascript($string)
{
if (is_object($string) == true) {
if (method_exists($string, '__toString') == false) {
throw EscapeException::fromBadObject($string);
}
$string = (string) $string;
}
if (is_array($string) == true) {
throw EscapeException::fromBadArray();
}
return $this->zendEscape->escapeJs($string);
}
/**
* Escapes strings based on context
* @param string $string The string to escape
* @param int $context The context to escape in
* @return string The escaped string
* @throws \InvalidArgumentException If the context is invalid
*/
public function escape($string, $context = self::HTML_BODY)
{
$type = gettype($string);
if (in_array($type, array('boolean', 'integer', 'double', 'NULL'), true)) {
return $string;
}
if (in_array($type, array('object', 'resource', 'unknown type'), true)) {
throw new \InvalidArgumentException("Unable to escape variable of type {$type}.");
}
if ($context === self::HTML_STRING) {
return parent::escapeHtml($string);
}
if ($context === self::HTML_ATTR) {
return parent::escapeHtmlAttr($string);
}
if ($context === self::CSS) {
return parent::escapeCss($string);
}
if ($context === self::JS_STRING) {
return parent::escapeJs($string);
}
if ($context === self::URL_PARAM) {
return parent::escapeUrl($string);
}
throw new \InvalidArgumentException('Invalid context.');
}
public function Index03Action()
{
/** JS SCRIPT */
$input = <<<INPUT
' onmouseover='alert(/ZF2!/);
INPUT;
$escaper = new Escape('utf-8');
$output = $escaper->escapeJs($input);
echo '<span title=' . $output . '>Zend</span>';
return $this->response;
}
/**
* Escapes strings to make them safe for use
* within HTML templates. Used by the auto-escaping
* functionality in setVar() and available to
* use within your views.
*
* Uses ZendFramework's Escaper to handle the actual escaping,
* based on context. Valid contexts are:
* - html
* - htmlAttr
* - js
* - css
* - url
*
* References:
* - https://www.owasp.org/index.php/XSS_(Cross_Site_Scripting)_Prevention_Cheat_Sheet
* - http://framework.zend.com/manual/current/en/modules/zend.escaper.introduction.html
*
* @param $data
* @param $context
* @param escaper // An instance of ZF's Escaper to avoid repeated class instantiation.
*
* @return string
*/
function esc($data, $context = 'html', $escaper = null)
{
if (is_array($data)) {
foreach ($data as $key => &$value) {
$value = esc($value, $context);
}
}
$context = strtolower($context);
if (!is_object($escaper)) {
$escaper = new Escaper(config_item('charset'));
}
// Valid context?
if (!in_array($context, ['html', 'htmlattr', 'js', 'css', 'url'])) {
throw new \InvalidArgumentException('Invalid Context type: ' . $context);
}
if (!is_string($data)) {
return $data;
}
switch ($context) {
case 'html':
$data = $escaper->escapeHtml($data);
break;
case 'htmlattr':
$data = $escaper->escapeHtmlAttr($data);
break;
case 'js':
$data = $escaper->escapeJs($data);
break;
case 'css':
$data = $escaper->escapeCss($data);
break;
case 'url':
$data = $escaper->escapeUrl($data);
break;
default:
break;
}
return $data;
}
/**
* {@inheritdoc}
*/
public function escapeJs($string)
{
return $this->escaper->escapeJs($string);
}
/**
* @param mixed $input
* @return mixed
*/
public static function escapeJs($input)
{
self::init();
return self::$escaper->escapeJs($input);
}
