HTMLPurifier_Context Class Reference

Registry object that contains information about the current context. More...

Collaboration diagram for HTMLPurifier_Context:

Public Member Functions
	register ($name, &$ref)
	Registers a variable into the context.
&	get ($name, $ignore_error=false)
	Retrieves a variable reference from the context.
	destroy ($name)
	Destroys a variable in the context.
	exists ($name)
	Checks whether or not the variable exists.
	loadArray ($context_array)
	Loads a series of variables from an associative array.

Private Attributes
	$_storage = array()
	Private array that stores the references.

Detailed Description

Registry object that contains information about the current context.

Warning

Is a bit buggy when variables are set to null: it thinks they don't exist! So use false instead, please.

Note

Since the variables Context deals with may not be objects, references are very important here! Do not remove!

Definition at line 10 of file Context.php.

Member Function Documentation

HTMLPurifier_Context::destroy

(

$name

)

Destroys a variable in the context.

Parameters

string

$name

String name

Definition at line 61 of file Context.php.

    {
        if (!array_key_exists($name, $this->_storage)) {
            trigger_error(
                "Attempted to destroy non-existent variable $name",
                E_USER_ERROR
            );
            return;
        }
        unset($this->_storage[$name]);
    }

HTMLPurifier_Context::exists

(

$name

)

Checks whether or not the variable exists.

Parameters

string

$name

String name

Returns

bool

Definition at line 78 of file Context.php.

    {
        return array_key_exists($name, $this->_storage);
    }

& HTMLPurifier_Context::get	(		$name,
			$ignore_error = false
	)

Retrieves a variable reference from the context.

Parameters

string	$name	String name
bool	$ignore_error	Boolean whether or not to ignore error

Returns

mixed

Definition at line 42 of file Context.php.

    {
        if (!array_key_exists($name, $this->_storage)) {
            if (!$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];
    }

HTMLPurifier_Context::loadArray

(

$context_array

)

Loads a series of variables from an associative array.

Parameters

array

$context_array

Assoc array of variables to load

Definition at line 87 of file Context.php.

    {
        foreach ($context_array as $key => $discard) {
            $this->register($key, $context_array[$key]);
        }
    }

HTMLPurifier_Context::register	(		$name,
		&	$ref
	)

Registers a variable into the context.

Parameters

string	$name	String name
mixed	$ref	Reference to variable to be registered

Definition at line 24 of file Context.php.

    {
        if (array_key_exists($name, $this->_storage)) {
            trigger_error(
                "Name $name produces collision, cannot re-register",
                E_USER_ERROR
            );
            return;
        }
        $this->_storage[$name] =& $ref;
    }

Field Documentation

HTMLPurifier_Context::$_storage = array()

private

Private array that stores the references.

array

Definition at line 17 of file Context.php.

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The documentation for this class was generated from the following file:

• Services/Html/HtmlPurifier/library/HTMLPurifier/Context.php