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<?php
/**
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* For full copyright and license information, please see the LICENSE.txt
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @package Cake.View
* @since CakePHP(tm) v 0.2.9
* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
*/
App::uses('Router', 'Routing');
App::uses('Hash', 'Utility');
/**
* Abstract base class for all other Helpers in CakePHP.
* Provides common methods and features.
*
* @package Cake.View
*/
class Helper extends Object {
/**
* Settings for this helper.
*
* @var array
*/
public $settings = array();
/**
* List of helpers used by this helper
*
* @var array
*/
public $helpers = array();
/**
* A helper lookup table used to lazy load helper objects.
*
* @var array
*/
protected $_helperMap = array();
/**
* The current theme name if any.
*
* @var string
*/
public $theme = null;
/**
* Request object
*
* @var CakeRequest
*/
public $request = null;
/**
* Plugin path
*
* @var string
*/
public $plugin = null;
/**
* Holds the fields array('field_name' => array('type' => 'string', 'length' => 100),
* primaryKey and validates array('field_name')
*
* @var array
*/
public $fieldset = array();
/**
* Holds tag templates.
*
* @var array
*/
public $tags = array();
/**
* Holds the content to be cleaned.
*
* @var mixed
*/
protected $_tainted = null;
/**
* Holds the cleaned content.
*
* @var mixed
*/
protected $_cleaned = null;
/**
* The View instance this helper is attached to
*
* @var View
*/
protected $_View;
/**
* A list of strings that should be treated as suffixes, or
* sub inputs for a parent input. This is used for date/time
* inputs primarily.
*
* @var array
*/
protected $_fieldSuffixes = array(
'year', 'month', 'day', 'hour', 'min', 'second', 'meridian'
);
/**
* The name of the current model entities are in scope of.
*
* @see Helper::setEntity()
* @var string
*/
protected $_modelScope;
/**
* The name of the current model association entities are in scope of.
*
* @see Helper::setEntity()
* @var string
*/
protected $_association;
/**
* The dot separated list of elements the current field entity is for.
*
* @see Helper::setEntity()
* @var string
*/
protected $_entityPath;
/**
* Minimized attributes
*
* @var array
*/
protected $_minimizedAttributes = array(
'compact', 'checked', 'declare', 'readonly', 'disabled', 'selected',
'defer', 'ismap', 'nohref', 'noshade', 'nowrap', 'multiple', 'noresize',
'autoplay', 'controls', 'loop', 'muted', 'required', 'novalidate', 'formnovalidate'
);
/**
* Format to attribute
*
* @var string
*/
protected $_attributeFormat = '%s="%s"';
/**
* Format to attribute
*
* @var string
*/
protected $_minimizedAttributeFormat = '%s="%s"';
/**
* Default Constructor
*
* @param View $View The View this helper is being attached to.
* @param array $settings Configuration settings for the helper.
*/
public function __construct(View $View, $settings = array()) {
$this->_View = $View;
$this->request = $View->request;
if ($settings) {
$this->settings = Hash::merge($this->settings, $settings);
}
if (!empty($this->helpers)) {
$this->_helperMap = ObjectCollection::normalizeObjectArray($this->helpers);
}
}
/**
* Provide non fatal errors on missing method calls.
*
* @param string $method Method to invoke
* @param array $params Array of params for the method.
* @return void
*/
public function __call($method, $params) {
trigger_error(__d('cake_dev', 'Method %1$s::%2$s does not exist', get_class($this), $method), E_USER_WARNING);
}
/**
* Lazy loads helpers. Provides access to deprecated request properties as well.
*
* @param string $name Name of the property being accessed.
* @return mixed Helper or property found at $name
*/
public function __get($name) {
if (isset($this->_helperMap[$name]) && !isset($this->{$name})) {
$settings = array_merge((array)$this->_helperMap[$name]['settings'], array('enabled' => false));
$this->{$name} = $this->_View->loadHelper($this->_helperMap[$name]['class'], $settings);
}
if (isset($this->{$name})) {
return $this->{$name};
}
switch ($name) {
case 'base':
case 'here':
case 'webroot':
case 'data':
return $this->request->{$name};
case 'action':
return isset($this->request->params['action']) ? $this->request->params['action'] : '';
case 'params':
return $this->request;
}
}
/**
* Provides backwards compatibility access for setting values to the request object.
*
* @param string $name Name of the property being accessed.
* @param mixed $value
* @return mixed Return the $value
*/
public function __set($name, $value) {
switch ($name) {
case 'base':
case 'here':
case 'webroot':
case 'data':
return $this->request->{$name} = $value;
case 'action':
return $this->request->params['action'] = $value;
}
return $this->{$name} = $value;
}
/**
* Finds URL for specified action.
*
* Returns a URL pointing at the provided parameters.
*
* @param string|array $url Either a relative string url like `/products/view/23` or
* an array of url parameters. Using an array for urls will allow you to leverage
* the reverse routing features of CakePHP.
* @param boolean $full If true, the full base URL will be prepended to the result
* @return string Full translated URL with base path.
* @link http://book.cakephp.org/2.0/en/views/helpers.html
*/
public function url($url = null, $full = false) {
return h(Router::url($url, $full));
}
/**
* Checks if a file exists when theme is used, if no file is found default location is returned
*
* @param string $file The file to create a webroot path to.
* @return string Web accessible path to file.
*/
public function webroot($file) {
$asset = explode('?', $file);
$asset[1] = isset($asset[1]) ? '?' . $asset[1] : null;
$webPath = "{$this->request->webroot}" . $asset[0];
$file = $asset[0];
if (!empty($this->theme)) {
$file = trim($file, '/');
$theme = $this->theme . '/';
if (DS === '\\') {
$file = str_replace('/', '\\', $file);
}
if (file_exists(Configure::read('App.www_root') . 'theme' . DS . $this->theme . DS . $file)) {
$webPath = "{$this->request->webroot}theme/" . $theme . $asset[0];
} else {
$themePath = App::themePath($this->theme);
$path = $themePath . 'webroot' . DS . $file;
if (file_exists($path)) {
$webPath = "{$this->request->webroot}theme/" . $theme . $asset[0];
}
}
}
if (strpos($webPath, '//') !== false) {
return str_replace('//', '/', $webPath . $asset[1]);
}
return $webPath . $asset[1];
}
/**
* Generate url for given asset file. Depending on options passed provides full url with domain name.
* Also calls Helper::assetTimestamp() to add timestamp to local files
*
* @param string|array Path string or url array
* @param array $options Options array. Possible keys:
* `fullBase` Return full url with domain name
* `pathPrefix` Path prefix for relative urls
* `ext` Asset extension to append
* `plugin` False value will prevent parsing path as a plugin
* @return string Generated url
*/
public function assetUrl($path, $options = array()) {
if (is_array($path)) {
return $this->url($path, !empty($options['fullBase']));
}
if (strpos($path, '://') !== false) {
return $path;
}
if (!array_key_exists('plugin', $options) || $options['plugin'] !== false) {
list($plugin, $path) = $this->_View->pluginSplit($path, false);
}
if (!empty($options['pathPrefix']) && $path[0] !== '/') {
$path = $options['pathPrefix'] . $path;
}
if (
!empty($options['ext']) &&
strpos($path, '?') === false &&
substr($path, -strlen($options['ext'])) !== $options['ext']
) {
$path .= $options['ext'];
}
if (isset($plugin)) {
$path = Inflector::underscore($plugin) . '/' . $path;
}
$path = $this->_encodeUrl($this->assetTimestamp($this->webroot($path)));
if (!empty($options['fullBase'])) {
$base = $this->url('/', true);
$len = strlen($this->request->webroot);
if ($len) {
$base = substr($base, 0, -$len);
}
$path = $base . $path;
}
return $path;
}
/**
* Encodes a URL for use in HTML attributes.
*
* @param string $url The url to encode.
* @return string The url encoded for both URL & HTML contexts.
*/
protected function _encodeUrl($url) {
$path = parse_url($url, PHP_URL_PATH);
$encoded = implode('/', array_map(
'rawurlencode',
explode('/', $path)
));
return h(str_replace($path, $encoded, $url));
}
/**
* Adds a timestamp to a file based resource based on the value of `Asset.timestamp` in
* Configure. If Asset.timestamp is true and debug > 0, or Asset.timestamp === 'force'
* a timestamp will be added.
*
* @param string $path The file path to timestamp, the path must be inside WWW_ROOT
* @return string Path with a timestamp added, or not.
*/
public function assetTimestamp($path) {
$stamp = Configure::read('Asset.timestamp');
$timestampEnabled = $stamp === 'force' || ($stamp === true && Configure::read('debug') > 0);
if ($timestampEnabled && strpos($path, '?') === false) {
$filepath = preg_replace('/^' . preg_quote($this->request->webroot, '/') . '/', '', $path);
$webrootPath = WWW_ROOT . str_replace('/', DS, $filepath);
if (file_exists($webrootPath)) {
//@codingStandardsIgnoreStart
return $path . '?' . @filemtime($webrootPath);
//@codingStandardsIgnoreEnd
}
$segments = explode('/', ltrim($filepath, '/'));
if ($segments[0] === 'theme') {
$theme = $segments[1];
unset($segments[0], $segments[1]);
$themePath = App::themePath($theme) . 'webroot' . DS . implode(DS, $segments);
//@codingStandardsIgnoreStart
return $path . '?' . @filemtime($themePath);
//@codingStandardsIgnoreEnd
} else {
$plugin = Inflector::camelize($segments[0]);
if (CakePlugin::loaded($plugin)) {
unset($segments[0]);
$pluginPath = CakePlugin::path($plugin) . 'webroot' . DS . implode(DS, $segments);
//@codingStandardsIgnoreStart
return $path . '?' . @filemtime($pluginPath);
//@codingStandardsIgnoreEnd
}
}
}
return $path;
}
/**
* Used to remove harmful tags from content. Removes a number of well known XSS attacks
* from content. However, is not guaranteed to remove all possibilities. Escaping
* content is the best way to prevent all possible attacks.
*
* @param string|array $output Either an array of strings to clean or a single string to clean.
* @return string|array cleaned content for output
*/
public function clean($output) {
$this->_reset();
if (empty($output)) {
return null;
}
if (is_array($output)) {
foreach ($output as $key => $value) {
$return[$key] = $this->clean($value);
}
return $return;
}
$this->_tainted = $output;
$this->_clean();
return $this->_cleaned;
}
/**
* Returns a space-delimited string with items of the $options array. If a key
* of $options array happens to be one of those listed in `Helper::$_minimizedAttributes`
*
* And its value is one of:
*
* - '1' (string)
* - 1 (integer)
* - true (boolean)
* - 'true' (string)
*
* Then the value will be reset to be identical with key's name.
* If the value is not one of these 3, the parameter is not output.
*
* 'escape' is a special option in that it controls the conversion of
* attributes to their html-entity encoded equivalents. Set to false to disable html-encoding.
*
* If value for any option key is set to `null` or `false`, that option will be excluded from output.
*
* @param array $options Array of options.
* @param array $exclude Array of options to be excluded, the options here will not be part of the return.
* @param string $insertBefore String to be inserted before options.
* @param string $insertAfter String to be inserted after options.
* @return string Composed attributes.
* @deprecated This method will be moved to HtmlHelper in 3.0
*/
protected function _parseAttributes($options, $exclude = null, $insertBefore = ' ', $insertAfter = null) {
if (!is_string($options)) {
$options = (array)$options + array('escape' => true);
if (!is_array($exclude)) {
$exclude = array();
}
$exclude = array('escape' => true) + array_flip($exclude);
$escape = $options['escape'];
$attributes = array();
foreach ($options as $key => $value) {
if (!isset($exclude[$key]) && $value !== false && $value !== null) {
$attributes[] = $this->_formatAttribute($key, $value, $escape);
}
}
$out = implode(' ', $attributes);
} else {
$out = $options;
}
return $out ? $insertBefore . $out . $insertAfter : '';
}
/**
* Formats an individual attribute, and returns the string value of the composed attribute.
* Works with minimized attributes that have the same value as their name such as 'disabled' and 'checked'
*
* @param string $key The name of the attribute to create
* @param string $value The value of the attribute to create.
* @param boolean $escape Define if the value must be escaped
* @return string The composed attribute.
* @deprecated This method will be moved to HtmlHelper in 3.0
*/
protected function _formatAttribute($key, $value, $escape = true) {
if (is_array($value)) {
$value = implode(' ' , $value);
}
if (is_numeric($key)) {
return sprintf($this->_minimizedAttributeFormat, $value, $value);
}
$truthy = array(1, '1', true, 'true', $key);
$isMinimized = in_array($key, $this->_minimizedAttributes);
if ($isMinimized && in_array($value, $truthy, true)) {
return sprintf($this->_minimizedAttributeFormat, $key, $key);
}
if ($isMinimized) {
return '';
}
return sprintf($this->_attributeFormat, $key, ($escape ? h($value) : $value));
}
/**
* Sets this helper's model and field properties to the dot-separated value-pair in $entity.
*
* @param string $entity A field name, like "ModelName.fieldName" or "ModelName.ID.fieldName"
* @param boolean $setScope Sets the view scope to the model specified in $tagValue
* @return void
*/
public function setEntity($entity, $setScope = false) {
if ($entity === null) {
$this->_modelScope = false;
}
if ($setScope === true) {
$this->_modelScope = $entity;
}
$parts = array_values(Hash::filter(explode('.', $entity)));
if (empty($parts)) {
return;
}
$count = count($parts);
$lastPart = isset($parts[$count - 1]) ? $parts[$count - 1] : null;
// Either 'body' or 'date.month' type inputs.
if (
($count === 1 && $this->_modelScope && !$setScope) ||
(
$count === 2 &&
in_array($lastPart, $this->_fieldSuffixes) &&
$this->_modelScope &&
$parts[0] !== $this->_modelScope
)
) {
$entity = $this->_modelScope . '.' . $entity;
}
// 0.name, 0.created.month style inputs. Excludes inputs with the modelScope in them.
if (
$count >= 2 &&
is_numeric($parts[0]) &&
!is_numeric($parts[1]) &&
$this->_modelScope &&
strpos($entity, $this->_modelScope) === false
) {
$entity = $this->_modelScope . '.' . $entity;
}
$this->_association = null;
$isHabtm = (
isset($this->fieldset[$this->_modelScope]['fields'][$parts[0]]['type']) &&
$this->fieldset[$this->_modelScope]['fields'][$parts[0]]['type'] === 'multiple'
);
// habtm models are special
if ($count === 1 && $isHabtm) {
$this->_association = $parts[0];
$entity = $parts[0] . '.' . $parts[0];
} else {
// check for associated model.
$reversed = array_reverse($parts);
foreach ($reversed as $i => $part) {
if ($i > 0 && preg_match('/^[A-Z]/', $part)) {
$this->_association = $part;
break;
}
}
}
$this->_entityPath = $entity;
}
/**
* Returns the entity reference of the current context as an array of identity parts
*
* @return array An array containing the identity elements of an entity
*/
public function entity() {
return explode('.', $this->_entityPath);
}
/**
* Gets the currently-used model of the rendering context.
*
* @return string
*/
public function model() {
if ($this->_association) {
return $this->_association;
}
return $this->_modelScope;
}
/**
* Gets the currently-used model field of the rendering context.
* Strips off field suffixes such as year, month, day, hour, min, meridian
* when the current entity is longer than 2 elements.
*
* @return string
*/
public function field() {
$entity = $this->entity();
$count = count($entity);
$last = $entity[$count - 1];
if ($count > 2 && in_array($last, $this->_fieldSuffixes)) {
$last = isset($entity[$count - 2]) ? $entity[$count - 2] : null;
}
return $last;
}
/**
* Generates a DOM ID for the selected element, if one is not set.
* Uses the current View::entity() settings to generate a CamelCased id attribute.
*
* @param array|string $options Either an array of html attributes to add $id into, or a string
* with a view entity path to get a domId for.
* @param string $id The name of the 'id' attribute.
* @return mixed If $options was an array, an array will be returned with $id set. If a string
* was supplied, a string will be returned.
*/
public function domId($options = null, $id = 'id') {
if (is_array($options) && array_key_exists($id, $options) && $options[$id] === null) {
unset($options[$id]);
return $options;
} elseif (!is_array($options) && $options !== null) {
$this->setEntity($options);
return $this->domId();
}
$entity = $this->entity();
$model = array_shift($entity);
$dom = $model . implode('', array_map(array('Inflector', 'camelize'), $entity));
if (is_array($options) && !array_key_exists($id, $options)) {
$options[$id] = $dom;
} elseif ($options === null) {
return $dom;
}
return $options;
}
/**
* Gets the input field name for the current tag. Creates input name attributes
* using CakePHP's data[Model][field] formatting.
*
* @param array|string $options If an array, should be an array of attributes that $key needs to be added to.
* If a string or null, will be used as the View entity.
* @param string $field
* @param string $key The name of the attribute to be set, defaults to 'name'
* @return mixed If an array was given for $options, an array with $key set will be returned.
* If a string was supplied a string will be returned.
*/
protected function _name($options = array(), $field = null, $key = 'name') {
if ($options === null) {
$options = array();
} elseif (is_string($options)) {
$field = $options;
$options = 0;
}
if (!empty($field)) {
$this->setEntity($field);
}
if (is_array($options) && array_key_exists($key, $options)) {
return $options;
}
switch ($field) {
case '_method':
$name = $field;
break;
default:
$name = 'data[' . implode('][', $this->entity()) . ']';
break;
}
if (is_array($options)) {
$options[$key] = $name;
return $options;
} else {
return $name;
}
}
/**
* Gets the data for the current tag
*
* @param array|string $options If an array, should be an array of attributes that $key needs to be added to.
* If a string or null, will be used as the View entity.
* @param string $field
* @param string $key The name of the attribute to be set, defaults to 'value'
* @return mixed If an array was given for $options, an array with $key set will be returned.
* If a string was supplied a string will be returned.
*/
public function value($options = array(), $field = null, $key = 'value') {
if ($options === null) {
$options = array();
} elseif (is_string($options)) {
$field = $options;
$options = 0;
}
if (is_array($options) && isset($options[$key])) {
return $options;
}
if (!empty($field)) {
$this->setEntity($field);
}
$result = null;
$data = $this->request->data;
$entity = $this->entity();
if (!empty($data) && is_array($data) && !empty($entity)) {
$result = Hash::get($data, implode('.', $entity));
}
$habtmKey = $this->field();
if (empty($result) && isset($data[$habtmKey][$habtmKey]) && is_array($data[$habtmKey])) {
$result = $data[$habtmKey][$habtmKey];
} elseif (empty($result) && isset($data[$habtmKey]) && is_array($data[$habtmKey])) {
if (ClassRegistry::isKeySet($habtmKey)) {
$model = ClassRegistry::getObject($habtmKey);
$result = $this->_selectedArray($data[$habtmKey], $model->primaryKey);
}
}
if (is_array($options)) {
if ($result === null && isset($options['default'])) {
$result = $options['default'];
}
unset($options['default']);
}
if (is_array($options)) {
$options[$key] = $result;
return $options;
} else {
return $result;
}
}
/**
* Sets the defaults for an input tag. Will set the
* name, value, and id attributes for an array of html attributes.
*
* @param string $field The field name to initialize.
* @param array $options Array of options to use while initializing an input field.
* @return array Array options for the form input.
*/
protected function _initInputField($field, $options = array()) {
if ($field !== null) {
$this->setEntity($field);
}
$options = (array)$options;
$options = $this->_name($options);
$options = $this->value($options);
$options = $this->domId($options);
return $options;
}
/**
* Adds the given class to the element options
*
* @param array $options Array options/attributes to add a class to
* @param string $class The classname being added.
* @param string $key the key to use for class.
* @return array Array of options with $key set.
*/
public function addClass($options = array(), $class = null, $key = 'class') {
if (isset($options[$key]) && trim($options[$key])) {
$options[$key] .= ' ' . $class;
} else {
$options[$key] = $class;
}
return $options;
}
/**
* Returns a string generated by a helper method
*
* This method can be overridden in subclasses to do generalized output post-processing
*
* @param string $str String to be output.
* @return string
* @deprecated This method will be removed in future versions.
*/
public function output($str) {
return $str;
}
/**
* Before render callback. beforeRender is called before the view file is rendered.
*
* Overridden in subclasses.
*
* @param string $viewFile The view file that is going to be rendered
* @return void
*/
public function beforeRender($viewFile) {
}
/**
* After render callback. afterRender is called after the view file is rendered
* but before the layout has been rendered.
*
* Overridden in subclasses.
*
* @param string $viewFile The view file that was rendered.
* @return void
*/
public function afterRender($viewFile) {
}
/**
* Before layout callback. beforeLayout is called before the layout is rendered.
*
* Overridden in subclasses.
*
* @param string $layoutFile The layout about to be rendered.
* @return void
*/
public function beforeLayout($layoutFile) {
}
/**
* After layout callback. afterLayout is called after the layout has rendered.
*
* Overridden in subclasses.
*
* @param string $layoutFile The layout file that was rendered.
* @return void
*/
public function afterLayout($layoutFile) {
}
/**
* Before render file callback.
* Called before any view fragment is rendered.
*
* Overridden in subclasses.
*
* @param string $viewFile The file about to be rendered.
* @return void
*/
public function beforeRenderFile($viewfile) {
}
/**
* After render file callback.
* Called after any view fragment is rendered.
*
* Overridden in subclasses.
*
* @param string $viewFile The file just be rendered.
* @param string $content The content that was rendered.
* @return void
*/
public function afterRenderFile($viewfile, $content) {
}
/**
* Transforms a recordset from a hasAndBelongsToMany association to a list of selected
* options for a multiple select element
*
* @param string|array $data
* @param string $key
* @return array
*/
protected function _selectedArray($data, $key = 'id') {
if (!is_array($data)) {
$model = $data;
if (!empty($this->request->data[$model][$model])) {
return $this->request->data[$model][$model];
}
if (!empty($this->request->data[$model])) {
$data = $this->request->data[$model];
}
}
$array = array();
if (!empty($data)) {
foreach ($data as $row) {
if (isset($row[$key])) {
$array[$row[$key]] = $row[$key];
}
}
}
return empty($array) ? null : $array;
}
/**
* Resets the vars used by Helper::clean() to null
*
* @return void
*/
protected function _reset() {
$this->_tainted = null;
$this->_cleaned = null;
}
/**
* Removes harmful content from output
*
* @return void
*/
protected function _clean() {
if (get_magic_quotes_gpc()) {
$this->_cleaned = stripslashes($this->_tainted);
} else {
$this->_cleaned = $this->_tainted;
}
$this->_cleaned = str_replace(array("&amp;", "&lt;", "&gt;"), array("&amp;amp;", "&amp;lt;", "&amp;gt;"), $this->_cleaned);
$this->_cleaned = preg_replace('#(&\#*\w+)[\x00-\x20]+;#u', "$1;", $this->_cleaned);
$this->_cleaned = preg_replace('#(&\#x*)([0-9A-F]+);*#iu', "$1$2;", $this->_cleaned);
$this->_cleaned = html_entity_decode($this->_cleaned, ENT_COMPAT, "UTF-8");
$this->_cleaned = preg_replace('#(<[^>]+[\x00-\x20\"\'\/])(on|xmlns)[^>]*>#iUu', "$1>", $this->_cleaned);
$this->_cleaned = preg_replace('#([a-z]*)[\x00-\x20]*=[\x00-\x20]*([\`\'\"]*)[\\x00-\x20]*j[\x00-\x20]*a[\x00-\x20]*v[\x00-\x20]*a[\x00-\x20]*s[\x00-\x20]*c[\x00-\x20]*r[\x00-\x20]*i[\x00-\x20]*p[\x00-\x20]*t[\x00-\x20]*:#iUu', '$1=$2nojavascript...', $this->_cleaned);
$this->_cleaned = preg_replace('#([a-z]*)[\x00-\x20]*=([\'\"]*)[\x00-\x20]*v[\x00-\x20]*b[\x00-\x20]*s[\x00-\x20]*c[\x00-\x20]*r[\x00-\x20]*i[\x00-\x20]*p[\x00-\x20]*t[\x00-\x20]*:#iUu', '$1=$2novbscript...', $this->_cleaned);
$this->_cleaned = preg_replace('#([a-z]*)[\x00-\x20]*=*([\'\"]*)[\x00-\x20]*-moz-binding[\x00-\x20]*:#iUu', '$1=$2nomozbinding...', $this->_cleaned);
$this->_cleaned = preg_replace('#([a-z]*)[\x00-\x20]*=([\'\"]*)[\x00-\x20]*data[\x00-\x20]*:#Uu', '$1=$2nodata...', $this->_cleaned);
$this->_cleaned = preg_replace('#(<[^>]+)style[\x00-\x20]*=[\x00-\x20]*([\`\'\"]*).*expression[\x00-\x20]*\([^>]*>#iU', "$1>", $this->_cleaned);
$this->_cleaned = preg_replace('#(<[^>]+)style[\x00-\x20]*=[\x00-\x20]*([\`\'\"]*).*behaviour[\x00-\x20]*\([^>]*>#iU', "$1>", $this->_cleaned);
$this->_cleaned = preg_replace('#(<[^>]+)style[\x00-\x20]*=[\x00-\x20]*([\`\'\"]*).*s[\x00-\x20]*c[\x00-\x20]*r[\x00-\x20]*i[\x00-\x20]*p[\x00-\x20]*t[\x00-\x20]*:*[^>]*>#iUu', "$1>", $this->_cleaned);
$this->_cleaned = preg_replace('#</*\w+:\w[^>]*>#i', "", $this->_cleaned);
do {
$oldstring = $this->_cleaned;
$this->_cleaned = preg_replace('#</*(applet|meta|xml|blink|link|style|script|embed|object|iframe|frame|frameset|ilayer|layer|bgsound|title|base)[^>]*>#i', "", $this->_cleaned);
} while ($oldstring != $this->_cleaned);
$this->_cleaned = str_replace(array("&amp;", "&lt;", "&gt;"), array("&amp;amp;", "&amp;lt;", "&amp;gt;"), $this->_cleaned);
}
}
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