*
	 * This is an HTML comment, but it looks like a CDATA node.
	 *
	 * @since 6.5.0
	 */
	const COMMENT_AS_PI_NODE_LOOKALIKE = 'COMMENT_AS_PI_NODE_LOOKALIKE';

	/**
	 * Indicates that a comment was created when encountering invalid
	 * HTML input, a so-called "bogus comment."
	 *
	 * Example:
	 *
	 *     <?nothing special>
	 *     <!{nothing special}>
	 *
	 * @since 6.5.0
	 */
	const COMMENT_AS_INVALID_HTML = 'COMMENT_AS_INVALID_HTML';

	/**
	 * No-quirks mode document compatibility mode.
	 *
	 * > In no-quirks mode, the behavior is (hopefully) the desired behavior
	 * > described by the modern HTML and CSS specifications.
	 *
	 * @see self::$compat_mode
	 * @see https://developer.mozilla.org/en-US/docs/Web/HTML/Quirks_Mode_and_Standards_Mode
	 *
	 * @since 6.7.0
	 *
	 * @var string
	 */
	const NO_QUIRKS_MODE = 'no-quirks-mode';

	/**
	 * Quirks mode document compatibility mode.
	 *
	 * > In quirks mode, layout emulates behavior in Navigator 4 and Internet
	 * > Explorer 5. This is essential in order to support websites that were
	 * > built before the widespread adoption of web standards.
	 *
	 * @see self::$compat_mode
	 * @see https://developer.mozilla.org/en-US/docs/Web/HTML/Quirks_Mode_and_Standards_Mode
	 *
	 * @since 6.7.0
	 *
	 * @var string
	 */
	const QUIRKS_MODE = 'quirks-mode';

	/**
	 * Indicates that a span of text may contain any combination of significant
	 * kinds of characters: NULL bytes, whitespace, and others.
	 *
	 * @see self::$text_node_classification
	 * @see self::subdivide_text_appropriately
	 *
	 * @since 6.7.0
	 */
	const TEXT_IS_GENERIC = 'TEXT_IS_GENERIC';

	/**
	 * Indicates that a span of text comprises a sequence only of NULL bytes.
	 *
	 * @see self::$text_node_classification
	 * @see self::subdivide_text_appropriately
	 *
	 * @since 6.7.0
	 */
	const TEXT_IS_NULL_SEQUENCE = 'TEXT_IS_NULL_SEQUENCE';

	/**
	 * Indicates that a span of decoded text comprises only whitespace.
	 *
	 * @see self::$text_node_classification
	 * @see self::subdivide_text_appropriately
	 *
	 * @since 6.7.0
	 */
	const TEXT_IS_WHITESPACE = 'TEXT_IS_WHITESPACE';

	/**
	 * Wakeup magic method.
	 *
	 * @since 6.9.2
	 */
	public function __wakeup() {
		throw new \LogicException( __CLASS__ . ' should never be unserialized' );
	}
}
<br />
<b>Fatal error</b>:  Uncaught Error: Class &quot;WP_HTML_Tag_Processor&quot; not found in /code/wp-includes/interactivity-api/class-wp-interactivity-api-directives-processor.php:18
Stack trace:
#0 /code/wp-settings.php(444): require()
#1 /code/wp-config.php(102): require_once('...')
#2 /code/wp-load.php(50): require_once('...')
#3 /code/wp-blog-header.php(13): require_once('...')
#4 /code/index.php(37): require('...')
#5 {main}
  thrown in <b>/code/wp-includes/interactivity-api/class-wp-interactivity-api-directives-processor.php</b> on line <b>18</b><br />
<br />
<b>Fatal error</b>:  Uncaught Error: Call to a member function set() on null in /code/wp-includes/l10n.php:857
Stack trace:
#0 /code/wp-includes/l10n.php(960): load_textdomain()
#1 /code/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain()
#2 [internal function]: WP_Fatal_Error_Handler-&gt;handle()
#3 {main}
  thrown in <b>/code/wp-includes/l10n.php</b> on line <b>857</b><br />