library/HTMLPurifier/Context.php

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<?php

class HTMLPurifier_Context
{
    
    private $_storage = array();
    
    public function register($name, &$ref) {
        if (isset($this->_storage[$name])) {
            trigger_error("Name $name produces collision, cannot re-register",
                          E_USER_ERROR);
            return;
        }
        $this->_storage[$name] =& $ref;
    }
    
    public function &get($name, $ignore_error = false) {
        if (!isset($this->_storage[$name])) {
            if (!$ignore_error) {
                trigger_error("Attempted to retrieve non-existent variable $name",
                              E_USER_ERROR);
            }
            $var = null; // so we can return by reference
            return $var;
        }
        return $this->_storage[$name];
    }
    
    public function destroy($name) {
        if (!isset($this->_storage[$name])) {
            trigger_error("Attempted to destroy non-existent variable $name",
                          E_USER_ERROR);
            return;
        }
        unset($this->_storage[$name]);
    }
    
    public function exists($name) {
        return isset($this->_storage[$name]);
    }
    
    public function loadArray($context_array) {
        foreach ($context_array as $key => $discard) {
            $this->register($key, $context_array[$key]);
        }
    }
    
}

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