diff -r 34716fd837a4 -r be944660c56a wp/wp-includes/pomo/streams.php
--- a/wp/wp-includes/pomo/streams.php	Tue Dec 15 15:52:01 2020 +0100
+++ b/wp/wp-includes/pomo/streams.php	Wed Sep 21 18:19:35 2022 +0200
@@ -11,15 +11,22 @@
 if ( ! class_exists( 'POMO_Reader', false ) ) :
 	class POMO_Reader {
 
-		var $endian = 'little';
-		var $_post  = '';
+		public $endian = 'little';
+		public $_post  = '';
 
 		/**
 		 * PHP5 constructor.
 		 */
 		function __construct() {
-			$this->is_overloaded = ( ( ini_get( 'mbstring.func_overload' ) & 2 ) != 0 ) && function_exists( 'mb_substr' ); // phpcs:ignore PHPCompatibility.IniDirectives.RemovedIniDirectives.mbstring_func_overloadDeprecated
-			$this->_pos          = 0;
+			if ( function_exists( 'mb_substr' )
+				&& ( (int) ini_get( 'mbstring.func_overload' ) & 2 ) // phpcs:ignore PHPCompatibility.IniDirectives.RemovedIniDirectives.mbstring_func_overloadDeprecated
+			) {
+				$this->is_overloaded = true;
+			} else {
+				$this->is_overloaded = false;
+			}
+
+			$this->_pos = 0;
 		}
 
 		/**
@@ -62,7 +69,7 @@
 		/**
 		 * Reads an array of 32-bit Integers from the Stream
 		 *
-		 * @param integer $count How many elements should be read
+		 * @param int $count How many elements should be read
 		 * @return mixed Array of integers or false if there isn't
 		 *  enough data or on error
 		 */
@@ -175,7 +182,7 @@
 
 		/**
 		 * @param int $pos
-		 * @return boolean
+		 * @return bool
 		 */
 		function seekto( $pos ) {
 			if ( -1 == fseek( $this->_f, $pos, SEEK_SET ) ) {
@@ -226,7 +233,7 @@
 	 */
 	class POMO_StringReader extends POMO_Reader {
 
-		var $_str = '';
+		public $_str = '';
 
 		/**
 		 * PHP5 constructor.