Allow getenv(null) for PHP > 8

resources/functionMap_php80delta.php

@@ -78,6 +78,8 @@
 		'imagejpeg' => ['bool', 'im'=>'GdImage', 'filename='=>'string|resource|null', 'quality='=>'int'],
 		'imagerotate' => ['false|object', 'src_im'=>'resource', 'angle'=>'float', 'bgdcolor'=>'int', 'ignoretransparent='=>'int'],
 		'imagescale' => ['false|object', 'im'=>'resource', 'new_width'=>'int', 'new_height='=>'int', 'method='=>'int'],
+		'getenv' => ['string|false', 'varname'=>'string', 'local_only='=>'bool'],
+		'getenv\'1' => ['array<string, string>', 'varname='=>'null', 'local_only='=>'bool'],
 		'ldap_set_rebind_proc' => ['bool', 'ldap'=>'resource', 'callback'=>'?callable'],
 		'mb_decode_numericentity' => ['string|false', 'string'=>'string', 'convmap'=>'array', 'encoding='=>'string'],
 		'mb_encoding_aliases' => ['list<non-falsy-string>', 'encoding'=>'string'],

src/Php/PhpVersion.php

@@ -353,4 +353,9 @@ public function substrReturnFalseInsteadOfEmptyString(): bool
 		return $this->versionId < 80000;
 	}
 
+	public function getenvAcceptsNull(): bool
+	{
+		return $this->versionId >= 80000;
+	}
+
 }

tests/PHPStan/Analyser/NodeScopeResolverTest.php

@@ -57,6 +57,12 @@ private static function findTestFiles(): iterable
 			yield __DIR__ . '/data/explode-php80.php';
 		}
 
+		if (PHP_VERSION_ID < 80000) {
+			yield __DIR__ . '/data/getenv-php74.php';
+		} else {
+			yield __DIR__ . '/data/getenv-php80.php';
+		}
+
 		if (PHP_VERSION_ID >= 80000) {
 			yield __DIR__ . '/../Reflection/data/unionTypes.php';
 			yield __DIR__ . '/../Reflection/data/mixedType.php';

tests/PHPStan/Analyser/data/getenv-php74.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace GetenvPHP74;
+
+use function PHPStan\Testing\assertType;
+
+class Foo
+{
+
+	public function test()
+	{
+		assertType('string|false', getenv(null));
+		assertType('array<string, string>', getenv());
+		assertType('string|false', getenv('foo'));
+	}
+
+}

tests/PHPStan/Analyser/data/getenv-php80.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace GetenvPHP80;
+
+use function PHPStan\Testing\assertType;
+
+class Foo
+{
+
+	public function test()
+	{
+		assertType('array<string, string>', getenv(null));
+		assertType('array<string, string>', getenv());
+		assertType('string|false', getenv('foo'));
+	}
+
+}

tests/PHPStan/Rules/Functions/CallToFunctionParametersRuleTest.php

@@ -2102,4 +2102,17 @@ public function testBug12499(): void
 		$this->analyse([__DIR__ . '/data/bug-12499.php'], []);
 	}
 
+	public function testBug13065(): void
+	{
+		$errors = [];
+		if (PHP_VERSION_ID < 80000) {
+			$errors[] = [
+				'Parameter #1 $varname of function getenv expects string, null given.',
+				10,
+			];
+		}
+
+		$this->analyse([__DIR__ . '/data/bug-13065.php'], $errors);
+	}
+
 }

tests/PHPStan/Rules/Functions/data/bug-13065.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace Bug13065;
+
+class Foo
+{
+
+	public function test()
+	{
+		getenv(null);
+		getenv();
+		getenv('foo');
+	}
+
+}