Restrict chr param for PHP 8.5+

resources/functionMap_php85delta.php

@@ -0,0 +1,23 @@
+<?php // phpcs:ignoreFile
+
+/**
+ * This contains the information needed to convert the function signatures for php 8.5 to php 8.4 (and vice versa)
+ *
+ * This has two sections.
+ * The 'new' section contains function/method names from FunctionSignatureMap (And alternates, if applicable) that do not exist in php8.4 or have different signatures in php 8.5.
+ *   If they were just updated, the function/method will be present in the 'added' signatures.
+ * The 'old' signatures contains the signatures that are different in php 8.4.
+ *   Functions are expected to be removed only in major releases of php.
+ *
+ * @see FunctionSignatureMap.php
+ *
+ * @phan-file-suppress PhanPluginMixedKeyNoKey (read by Phan when analyzing this file)
+ */
+return [
+	'new' => [
+		'chr' => ['non-empty-string', 'ascii'=>'int<0,255>'],
+	],
+	'old' => [
+		'chr' => ['non-empty-string', 'ascii'=>'int'],
+	]
+];

src/Reflection/SignatureMap/FunctionSignatureMapProvider.php

@@ -219,6 +219,10 @@ public function getSignatureMap(): array
 			$signatureMap = $this->computeSignatureMapFile($signatureMap, __DIR__ . '/../../../resources/functionMap_php84delta.php');
 		}
 
+		if ($this->phpVersion->getVersionId() >= 80500) {
+			$signatureMap = $this->computeSignatureMapFile($signatureMap, __DIR__ . '/../../../resources/functionMap_php85delta.php');
+		}
+
 		return self::$signatureMaps[$cacheKey] = $signatureMap;
 	}
 

tests/PHPStan/Rules/Functions/CallToFunctionParametersRuleTest.php

@@ -2505,6 +2505,17 @@ public function testClone(): void
 		]);
 	}
 
+	#[RequiresPhp('>= 8.5')]
+	public function testBug13930(): void
+	{
+		$this->analyse([__DIR__ . '/data/bug-13930.php'], [
+			[
+				'Parameter #1 $codepoint of function chr expects int<0, 255>, 256 given.',
+				9,
+			],
+		]);
+	}
+
 	#[RequiresPhp('>= 8.1')]
 	public function testBug13862(): void
 	{

tests/PHPStan/Rules/Functions/data/bug-13930.php

@@ -0,0 +1,11 @@
+<?php declare(strict_types = 1);
+
+namespace Bug13930;
+
+class HelloWorld
+{
+	public function sayHello() : void
+	{
+		var_dump(chr(256));
+	}
+}