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96 lines
2.6 KiB
96 lines
2.6 KiB
4 years ago
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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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