diff --git a/wp-includes/html-api/class-wp-html-tag-processor.php b/wp-includes/html-api/class-wp-html-tag-processor.php
index 233d47eb8d..2b115dd156 100644
--- a/wp-includes/html-api/class-wp-html-tag-processor.php
+++ b/wp-includes/html-api/class-wp-html-tag-processor.php
@@ -3385,6 +3385,58 @@ class WP_HTML_Tag_Processor {
 		return $this->comment_type;
 	}
 
+	/**
+	 * Returns the text of a matched comment or null if not on a comment type node.
+	 *
+	 * This method returns the entire text content of a comment node as it
+	 * would appear in the browser.
+	 *
+	 * This differs from {@see ::get_modifiable_text()} in that certain comment
+	 * types in the HTML API cannot allow their entire comment text content to
+	 * be modified. Namely, "bogus comments" of the form `<?not allowed in html>`
+	 * will create a comment whose text content starts with `?`. Note that if
+	 * that character were modified, it would be possible to change the node
+	 * type.
+	 *
+	 * @since 6.7.0
+	 *
+	 * @return string|null The comment text as it would appear in the browser or null
+	 *                     if not on a comment type node.
+	 */
+	public function get_full_comment_text(): ?string {
+		if ( self::STATE_FUNKY_COMMENT === $this->parser_state ) {
+			return $this->get_modifiable_text();
+		}
+
+		if ( self::STATE_COMMENT !== $this->parser_state ) {
+			return null;
+		}
+
+		switch ( $this->get_comment_type() ) {
+			case self::COMMENT_AS_HTML_COMMENT:
+			case self::COMMENT_AS_ABRUPTLY_CLOSED_COMMENT:
+				return $this->get_modifiable_text();
+
+			case self::COMMENT_AS_CDATA_LOOKALIKE:
+				return "[CDATA[{$this->get_modifiable_text()}]]";
+
+			case self::COMMENT_AS_PI_NODE_LOOKALIKE:
+				return "?{$this->get_tag()}{$this->get_modifiable_text()}?";
+
+			/*
+			 * This represents "bogus comments state" from HTML tokenization.
+			 * This can be entered by `<?` or `<!`, where `?` is included in
+			 * the comment text but `!` is not.
+			 */
+			case self::COMMENT_AS_INVALID_HTML:
+				$preceding_character = $this->html[ $this->text_starts_at - 1 ];
+				$comment_start       = '?' === $preceding_character ? '?' : '';
+				return "{$comment_start}{$this->get_modifiable_text()}";
+		}
+
+		return null;
+	}
+
 	/**
 	 * Subdivides a matched text node, splitting NULL byte sequences and decoded whitespace as
 	 * distinct nodes prefixes.
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 6ceac1f79f..fedbeb62b2 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.7-alpha-59074';
+$wp_version = '6.7-alpha-59075';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.