Fix #20654: Add missing generics in yii\db namespace. Fix PHPDoc annotations in yii\db\ArrayExpression

framework/db/ArrayExpression.php

@@ -25,6 +25,9 @@ use yii\base\InvalidConfigException;
  * @author Dmytro Naumenko <d.naumenko.a@gmail.com>
  * @since 2.0.14
  * @phpcs:disable Squiz.NamingConventions.ValidVariableName.PrivateNoUnderscore
+ *
+ * @implements \ArrayAccess<array-key, mixed>
+ * @implements \IteratorAggregate<array-key, mixed>
  */
 class ArrayExpression implements ExpressionInterface, \ArrayAccess, \Countable, \IteratorAggregate
 {
@@ -96,7 +99,7 @@ class ArrayExpression implements ExpressionInterface, \ArrayAccess, \Countable,
      * Whether a offset exists
      *
      * @link https://www.php.net/manual/en/arrayaccess.offsetexists.php
-     * @param mixed $offset <p>
+     * @param int|string $offset <p>
      * An offset to check for.
      * </p>
      * @return bool true on success or false on failure.
@@ -115,7 +118,7 @@ class ArrayExpression implements ExpressionInterface, \ArrayAccess, \Countable,
      * Offset to retrieve
      *
      * @link https://www.php.net/manual/en/arrayaccess.offsetget.php
-     * @param mixed $offset <p>
+     * @param int|string $offset <p>
      * The offset to retrieve.
      * </p>
      * @return mixed Can return all value types.
@@ -131,7 +134,7 @@ class ArrayExpression implements ExpressionInterface, \ArrayAccess, \Countable,
      * Offset to set
      *
      * @link https://www.php.net/manual/en/arrayaccess.offsetset.php
-     * @param mixed $offset <p>
+     * @param int|string $offset <p>
      * The offset to assign the value to.
      * </p>
      * @param mixed $value <p>
@@ -150,7 +153,7 @@ class ArrayExpression implements ExpressionInterface, \ArrayAccess, \Countable,
      * Offset to unset
      *
      * @link https://www.php.net/manual/en/arrayaccess.offsetunset.php
-     * @param mixed $offset <p>
+     * @param int|string $offset <p>
      * The offset to unset.
      * </p>
      * @return void