From d1a42f6c690910397333b6769dde425b10499a09 Mon Sep 17 00:00:00 2001
From: lhchavez <lhchavez@lhchavez.com>
Date: Tue, 1 Sep 2020 06:21:32 -0700
Subject: [PATCH] Add `null` as a possible type parameter to `strval` (#4100)

https://www.php.net/manual/en/language.types.string.php#language.types.string.casting mentions

> `NULL` is always converted to an empty string.

Which seems to indicate that it is a valid argument for it.

As opposed to stringifying other types (like arrays), `strval(null)` does not cause a warning in PHP.
---
 src/Psalm/Internal/Stubs/CoreGenericFunctions.phpstub | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Psalm/Internal/Stubs/CoreGenericFunctions.phpstub b/src/Psalm/Internal/Stubs/CoreGenericFunctions.phpstub
index 594cc6af0..adbc118c7 100644
--- a/src/Psalm/Internal/Stubs/CoreGenericFunctions.phpstub
+++ b/src/Psalm/Internal/Stubs/CoreGenericFunctions.phpstub
@@ -680,7 +680,7 @@ function bcdiv(string $left_operand, string $right_operand, int $scale = 0): ?st
 /**
  * @psalm-pure
  *
- * @param scalar|object $var
+ * @param scalar|null|object $var
  * @return string The string value of var.
  *
  * @psalm-flow ($var) -> return