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htmlpurifier/library/HTMLPurifier/Context.php
2006-10-01 18:39:48 +00:00

65 lines
1.5 KiB
PHP

<?php
/**
* Registry object that contains information about the current context.
*/
class HTMLPurifier_Context
{
/**
* Private array that stores the references.
* @private
*/
var $_storage = array();
/**
* Registers a variable into the context.
* @param $name String name
* @param $ref Variable to be registered
*/
function register($name, &$ref) {
if (isset($this->_storage[$name])) {
trigger_error('Name collision, cannot re-register',
E_USER_ERROR);
return;
}
$this->_storage[$name] =& $ref;
}
/**
* Retrieves a variable reference from the context.
* @param $name String name
*/
function &get($name) {
if (!isset($this->_storage[$name])) {
trigger_error('Attempted to retrieve non-existent variable',
E_USER_ERROR);
return;
}
return $this->_storage[$name];
}
/**
* Destorys a variable in the context.
* @param $name String name
*/
function destroy($name) {
if (!isset($this->_storage[$name])) {
trigger_error('Attempted to destroy non-existent variable',
E_USER_ERROR);
return;
}
unset($this->_storage[$name]);
}
/**
* Checks whether or not the variable exists.
* @param $name String name
*/
function exists($name) {
return isset($this->_storage[$name]);
}
}
?>