Fix #19041: Fix PHP 8.1 issues

framework/db/ArrayExpression.php

@@ -104,6 +104,7 @@ class ArrayExpression implements ExpressionInterface, \ArrayAccess, \Countable,
      * The return value will be casted to boolean if non-boolean was returned.
      * @since 2.0.14
      */
+    #[\ReturnTypeWillChange]
     public function offsetExists($offset)
     {
         return isset($this->value[$offset]);
@@ -119,6 +120,7 @@ class ArrayExpression implements ExpressionInterface, \ArrayAccess, \Countable,
      * @return mixed Can return all value types.
      * @since 2.0.14
      */
+    #[\ReturnTypeWillChange]
     public function offsetGet($offset)
     {
         return $this->value[$offset];
@@ -137,6 +139,7 @@ class ArrayExpression implements ExpressionInterface, \ArrayAccess, \Countable,
      * @return void
      * @since 2.0.14
      */
+    #[\ReturnTypeWillChange]
     public function offsetSet($offset, $value)
     {
         $this->value[$offset] = $value;
@@ -152,6 +155,7 @@ class ArrayExpression implements ExpressionInterface, \ArrayAccess, \Countable,
      * @return void
      * @since 2.0.14
      */
+    #[\ReturnTypeWillChange]
     public function offsetUnset($offset)
     {
         unset($this->value[$offset]);
@@ -167,6 +171,7 @@ class ArrayExpression implements ExpressionInterface, \ArrayAccess, \Countable,
      * The return value is cast to an integer.
      * @since 2.0.14
      */
+    #[\ReturnTypeWillChange]
     public function count()
     {
         return count($this->value);
@@ -181,6 +186,7 @@ class ArrayExpression implements ExpressionInterface, \ArrayAccess, \Countable,
      * @since 2.0.14.1
      * @throws InvalidConfigException when ArrayExpression contains QueryInterface object
      */
+    #[\ReturnTypeWillChange]
     public function getIterator()
     {
         $value = $this->getValue();