From f173f43e2ba40a654816dc367fb9a7aa3184c6d5 Mon Sep 17 00:00:00 2001
From: ondrejmirtes <104888+ondrejmirtes@users.noreply.github.com>
Date: Thu, 12 Feb 2026 08:46:11 +0000
Subject: [PATCH] Fix #13609

---
 src/Rules/Functions/PrintfPlaceholder.php                | 6 +++++-
 .../Rules/Functions/PrintfParameterTypeRuleTest.php      | 4 ----
 .../PHPStan/Rules/Functions/data/printf-param-types.php  | 9 +++++++++
 3 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/src/Rules/Functions/PrintfPlaceholder.php b/src/Rules/Functions/PrintfPlaceholder.php
index 28832bd575..1a776ddb53 100644
--- a/src/Rules/Functions/PrintfPlaceholder.php
+++ b/src/Rules/Functions/PrintfPlaceholder.php
@@ -34,7 +34,11 @@ public function doesArgumentTypeMatchPlaceholder(Type $argumentType, bool $stric
 				return (new IntegerType())->accepts($argumentType, true)->yes();
 			case 'int':
 				return $strictPlaceholderTypes
-					? (new IntegerType())->accepts($argumentType, true)->yes()
+					? (new UnionType([
+						new IntegerType(),
+						// numeric-string is allowed for consistency with the float case and phpstan-strict-rules.
+						new IntersectionType([new StringType(), new AccessoryNumericStringType()]),
+					]))->accepts($argumentType, true)->yes()
 					: ! $argumentType->toInteger() instanceof ErrorType;
 			case 'float':
 				return $strictPlaceholderTypes
diff --git a/tests/PHPStan/Rules/Functions/PrintfParameterTypeRuleTest.php b/tests/PHPStan/Rules/Functions/PrintfParameterTypeRuleTest.php
index 835700921c..c5c720cb05 100644
--- a/tests/PHPStan/Rules/Functions/PrintfParameterTypeRuleTest.php
+++ b/tests/PHPStan/Rules/Functions/PrintfParameterTypeRuleTest.php
@@ -206,10 +206,6 @@ public function testStrict(): void
 				'Parameter #2 of function printf is expected to be int by placeholder #1 ("%d"), string given.',
 				36,
 			],
-			[
-				'Parameter #2 of function printf is expected to be int by placeholder #1 ("%d"), string given.',
-				37,
-			],
 			[
 				'Parameter #2 of function printf is expected to be int by placeholder #1 ("%d"), null given.',
 				38,
diff --git a/tests/PHPStan/Rules/Functions/data/printf-param-types.php b/tests/PHPStan/Rules/Functions/data/printf-param-types.php
index f3c54c77d7..52ca882e7e 100644
--- a/tests/PHPStan/Rules/Functions/data/printf-param-types.php
+++ b/tests/PHPStan/Rules/Functions/data/printf-param-types.php
@@ -70,3 +70,12 @@ public function __toString(): string
 printf('%s %2$*s', 'a', 5, 'a');
 printf('%1$-+\'X10.2f', 5);
 printf('%1$*.*f %s %2$d', 5, 6, new FooStringable()); // 5.000000 foo 6
+
+// Bug #13609 - numeric-string should be accepted by %d placeholder
+/** @param numeric-string $numericStr */
+function testNumericStringWithIntPlaceholder(string $numericStr): void {
+	printf('%d', $numericStr);
+	printf('%04d-%02d-%02d', $numericStr, $numericStr, $numericStr);
+	sprintf('%d', $numericStr);
+	printf('%f', $numericStr);
+}