diff --git a/wp-includes/compat.php b/wp-includes/compat.php
index f0bdf07974..84e611faee 100644
--- a/wp-includes/compat.php
+++ b/wp-includes/compat.php
@@ -539,6 +539,48 @@ if ( ! function_exists( 'array_all' ) ) {
 	}
 }
 
+if ( ! function_exists( 'array_first' ) ) {
+	/**
+	 * Polyfill for `array_first()` function added in PHP 8.5.
+	 *
+	 * Returns the first element of an array.
+	 *
+	 * @since 6.9.0
+	 *
+	 * @param array $array The array to get the first element from.
+	 * @return mixed|null The first element of the array, or null if the array is empty.
+	 */
+	function array_first( array $array ) { // phpcs:ignore Universal.NamingConventions.NoReservedKeywordParameterNames.arrayFound
+		if ( empty( $array ) ) {
+			return null;
+		}
+
+		foreach ( $array as $value ) {
+			return $value;
+		}
+	}
+}
+
+if ( ! function_exists( 'array_last' ) ) {
+	/**
+	 * Polyfill for `array_last()` function added in PHP 8.5.
+	 *
+	 * Returns the last element of an array.
+	 *
+	 * @since 6.9.0
+	 *
+	 * @param array $array The array to get the last element from.
+	 * @return mixed|null The last element of the array, or null if the array is empty.
+	 */
+	function array_last( array $array ) { // phpcs:ignore Universal.NamingConventions.NoReservedKeywordParameterNames.arrayFound
+		if ( empty( $array ) ) {
+			return null;
+		}
+
+		return $array[ array_key_last( $array ) ];
+	}
+}
+
 // IMAGETYPE_AVIF constant is only defined in PHP 8.x or later.
 if ( ! defined( 'IMAGETYPE_AVIF' ) ) {
 	define( 'IMAGETYPE_AVIF', 19 );
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 2f55d7808b..86820be505 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.9-alpha-60671';
+$wp_version = '6.9-alpha-60672';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.