Document null as a possible type

lib/Doctrine/DBAL/Connection.php

@@ -1035,8 +1035,8 @@ class Connection implements DriverConnection
      * This method supports PDO binding types as well as DBAL mapping types.
      *
      * @param string                 $query  The SQL query.
-     * @param mixed[]        $params The query parameters.
-     * @param int[]|string[] $types  The parameter types.
+     * @param array<mixed>           $params The query parameters.
+     * @param array<int|string|null> $types  The parameter types.
      *
      * @return int The number of affected rows.
      *

lib/Doctrine/DBAL/Logging/SQLLogger.php

@@ -12,7 +12,7 @@ interface SQLLogger
      *
      * @param string                 $sql    The SQL to be executed.
      * @param mixed[]|null           $params The SQL parameters.
-     * @param int[]|string[]|null $types  The SQL parameter types.
+     * @param array<int|string|null> $types  The SQL parameter types.
      *
      * @return void
      */

lib/Doctrine/DBAL/SQLParserUtils.php

@@ -120,7 +120,7 @@ class SQLParserUtils
      *
      * @param string                 $query  The SQL query to execute.
      * @param mixed[]                $params The parameters to bind to the query.
-     * @param int[]|string[] $types  The types the previous parameters are in.
+     * @param array<string|int|null> $types  The types the previous parameters are in.
      *
      * @return mixed[]
      *