diff -r 7b1b88e27a20 -r 48c4eec2b7e6 wp/wp-includes/html-api/class-wp-html-text-replacement.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/html-api/class-wp-html-text-replacement.php	Fri Sep 05 18:40:08 2025 +0200
@@ -0,0 +1,64 @@
+<?php
+/**
+ * HTML API: WP_HTML_Text_Replacement class
+ *
+ * @package WordPress
+ * @subpackage HTML-API
+ * @since 6.2.0
+ */
+
+/**
+ * Core class used by the HTML tag processor as a data structure for replacing
+ * existing content from start to end, allowing to drastically improve performance.
+ *
+ * This class is for internal usage of the WP_HTML_Tag_Processor class.
+ *
+ * @access private
+ * @since 6.2.0
+ * @since 6.5.0 Replace `end` with `length` to more closely match `substr()`.
+ *
+ * @see WP_HTML_Tag_Processor
+ */
+class WP_HTML_Text_Replacement {
+	/**
+	 * Byte offset into document where replacement span begins.
+	 *
+	 * @since 6.2.0
+	 *
+	 * @var int
+	 */
+	public $start;
+
+	/**
+	 * Byte length of span being replaced.
+	 *
+	 * @since 6.5.0
+	 *
+	 * @var int
+	 */
+	public $length;
+
+	/**
+	 * Span of text to insert in document to replace existing content from start to end.
+	 *
+	 * @since 6.2.0
+	 *
+	 * @var string
+	 */
+	public $text;
+
+	/**
+	 * Constructor.
+	 *
+	 * @since 6.2.0
+	 *
+	 * @param int    $start  Byte offset into document where replacement span begins.
+	 * @param int    $length Byte length of span in document being replaced.
+	 * @param string $text   Span of text to insert in document to replace existing content from start to end.
+	 */
+	public function __construct( $start, $length, $text ) {
+		$this->start  = $start;
+		$this->length = $length;
+		$this->text   = $text;
+	}
+}