Represents a token in the HTML document for tracking in parser stacks.

Source: wp-includes/html-api/class-wp-html-token.php
Since: 6.4.0
Access: private

Properties

bookmark_name

public $bookmark_name = null;

Type: string|null

Name of bookmark corresponding to this token’s location in the input HTML. A null value indicates a marker or virtual node without a bookmark.

Note: Having a bookmark name does not guarantee the token still exists — the source may have been modified.

node_name

public $node_name = null;

Type: string|null

Name of the node. Uppercase names are HTML elements (e.g., "DIV"). Lowercase names are special values (e.g., "marker").

has_self_closing_flag

public $has_self_closing_flag = false;

Type: bool

Whether the token has the self-closing flag (/>). This reports presence of the flag, not whether the element is actually void.

namespace

public $namespace = 'html';

Type: string

Indicates the element’s namespace: "html", "svg", or "math".

integration_node_type

public $integration_node_type = null;

Type: string|null

Indicates the type of integration point: "math", "html", or null if not an integration point.

on_destroy

public $on_destroy = null;

Type: callable|null

Callback invoked when the token is garbage-collected. Typically used to release associated bookmarks.

Methods

__construct()

Creates a token reference.

public function __construct(
    ?string $bookmark_name,
    string $node_name,
    bool $has_self_closing_flag,
    ?callable $on_destroy = null
)

Example:

// Create a token for a DIV element
$token = new WP_HTML_Token(
    'bookmark_123',
    'DIV',
    false,
    function( $bookmark_name ) use ( $processor ) {
        $processor->release_bookmark( $bookmark_name );
    }
);

// Create a marker (no bookmark)
$marker = new WP_HTML_Token( null, 'marker', false );

__destruct()

Destructor that invokes the on_destroy callback.

public function __destruct()

When the token is garbage-collected, the destructor calls the on_destroy callback with the bookmark name, allowing automatic bookmark cleanup.

__wakeup()

Prevents unserialization for security.

public function __wakeup()

Throws: LogicException

Usage Examples

Creating Element Tokens

// Token for an HTML element
$div = new WP_HTML_Token( 'bk_1', 'DIV', false );

// Token for a void element with self-closing flag
$img = new WP_HTML_Token( 'bk_2', 'IMG', true );

// Token in SVG namespace
$rect = new WP_HTML_Token( 'bk_3', 'rect', false );
$rect->namespace = 'svg';

Creating Markers

// Markers use lowercase names and no bookmark
$marker = new WP_HTML_Token( null, 'marker', false );

With Cleanup Callback

$processor = new WP_HTML_Tag_Processor( $html );
$processor->next_tag( 'div' );
$processor->set_bookmark( 'my-div' );

$token = new WP_HTML_Token(
    'my-div',
    'DIV',
    false,
    function( $bookmark_name ) use ( $processor ) {
        // Automatically release bookmark when token is destroyed
        $processor->release_bookmark( $bookmark_name );
    }
);

// When $token goes out of scope, the bookmark is released

Node Name Conventions

Integration Points

Integration points are elements in foreign content (SVG/MathML) where HTML parsing rules apply:

MathML integration points: mi, mo, mn, ms, mtext

HTML integration points: annotation-xml (with specific conditions), SVG foreignObject, desc, title