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<?php |
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/** |
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* Registry object that contains information about the current context. |
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* @warning Is a bit buggy when variables are set to null: it thinks |
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* they don't exist! So use false instead, please. |
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* @note Since the variables Context deals with may not be objects, |
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* references are very important here! Do not remove! |
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*/ |
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class HTMLPurifier_Context |
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{ |
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/** |
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* Private array that stores the references. |
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* @type array |
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*/ |
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private $_storage = array(); |
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/** |
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* Registers a variable into the context. |
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* @param string $name String name |
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* @param mixed $ref Reference to variable to be registered |
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*/ |
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public function register($name, &$ref) |
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{ |
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if (array_key_exists($name, $this->_storage)) { |
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trigger_error( |
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"Name $name produces collision, cannot re-register", |
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E_USER_ERROR |
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); |
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return; |
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} |
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$this->_storage[$name] =& $ref; |
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} |
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/** |
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* Retrieves a variable reference from the context. |
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* @param string $name String name |
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* @param bool $ignore_error Boolean whether or not to ignore error |
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* @return mixed |
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*/ |
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public function &get($name, $ignore_error = false) |
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{ |
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if (!array_key_exists($name, $this->_storage)) { |
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if (!$ignore_error) { |
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trigger_error( |
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"Attempted to retrieve non-existent variable $name", |
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E_USER_ERROR |
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); |
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} |
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$var = null; // so we can return by reference |
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return $var; |
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} |
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return $this->_storage[$name]; |
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} |
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/** |
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* Destroys a variable in the context. |
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* @param string $name String name |
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*/ |
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public function destroy($name) |
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{ |
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if (!array_key_exists($name, $this->_storage)) { |
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trigger_error( |
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"Attempted to destroy non-existent variable $name", |
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E_USER_ERROR |
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); |
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return; |
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} |
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unset($this->_storage[$name]); |
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} |
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/** |
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* Checks whether or not the variable exists. |
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* @param string $name String name |
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* @return bool |
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*/ |
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public function exists($name) |
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{ |
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return array_key_exists($name, $this->_storage); |
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} |
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/** |
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* Loads a series of variables from an associative array |
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* @param array $context_array Assoc array of variables to load |
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*/ |
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public function loadArray($context_array) |
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{ |
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foreach ($context_array as $key => $discard) { |
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$this->register($key, $context_array[$key]); |
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} |
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} |
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} |
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// vim: et sw=4 sts=4 |
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XOOPS /
XoopsCore25
