define: case_insensitive is ignored, case-insensitive constants are no longer supported

conf/config.level0.neon

@@ -36,6 +36,7 @@ rules:
 	- PHPStan\Rules\Functions\ArrowFunctionReturnNullsafeByRefRule
 	- PHPStan\Rules\Functions\CallToFunctionParametersRule
 	- PHPStan\Rules\Functions\ClosureAttributesRule
+	- PHPStan\Rules\Functions\DefineParametersRule
 	- PHPStan\Rules\Functions\ExistingClassesInArrowFunctionTypehintsRule
 	- PHPStan\Rules\Functions\ExistingClassesInClosureTypehintsRule
 	- PHPStan\Rules\Functions\ExistingClassesInTypehintsRule

src/Php/PhpVersion.php

@@ -147,4 +147,9 @@ public function supportsEnums(): bool
 		return $this->versionId >= 80100;
 	}
 
+	public function supportsCaseInsensitiveConstantNames(): bool
+	{
+		return $this->versionId < 80000;
+	}
+
 }

src/Rules/Functions/DefineParametersRule.php

@@ -0,0 +1,54 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Rules\Functions;
+
+use PhpParser\Node;
+use PhpParser\Node\Expr\FuncCall;
+use PHPStan\Analyser\Scope;
+use PHPStan\Php\PhpVersion;
+use PHPStan\Rules\RuleErrorBuilder;
+
+/**
+ * @implements \PHPStan\Rules\Rule<\PhpParser\Node\Expr\FuncCall>
+ */
+class DefineParametersRule implements \PHPStan\Rules\Rule
+{
+
+	private PhpVersion $phpVersion;
+
+	public function __construct(PhpVersion $phpVersion)
+	{
+		$this->phpVersion = $phpVersion;
+	}
+
+	public function getNodeType(): string
+	{
+		return FuncCall::class;
+	}
+
+	public function processNode(Node $node, Scope $scope): array
+	{
+		if (!($node->name instanceof \PhpParser\Node\Name)) {
+			return [];
+		}
+		if ($this->phpVersion->supportsCaseInsensitiveConstantNames()) {
+			return [];
+		}
+		$name = strtolower((string) $node->name);
+		if ($name !== 'define') {
+			return [];
+		}
+		$args = $node->getArgs();
+		$argsCount = count($args);
+		// Expects 2 or 3, 1 arg is caught by CallToFunctionParametersRule
+		if ($argsCount < 3) {
+			return [];
+		}
+		return [
+			RuleErrorBuilder::message(
+				'Argument #3 ($case_insensitive) is ignored since declaration of case-insensitive constants is no longer supported.'
+			)->line($node->getLine())->build(),
+		];
+	}
+
+}

tests/PHPStan/Rules/Functions/DefineParametersRuleTest.php

@@ -0,0 +1,32 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Rules\Functions;
+
+use PHPStan\Php\PhpVersion;
+
+/**
+ * @extends \PHPStan\Testing\RuleTestCase<DefineParametersRule>
+ */
+class DefineParametersRuleTest extends \PHPStan\Testing\RuleTestCase
+{
+
+	protected function getRule(): \PHPStan\Rules\Rule
+	{
+		return new DefineParametersRule(new PhpVersion(PHP_VERSION_ID));
+	}
+
+	public function testFile(): void
+	{
+		if (PHP_VERSION_ID < 80000) {
+			$this->analyse([__DIR__ . '/data/call-to-define.php'], []);
+		} else {
+			$this->analyse([__DIR__ . '/data/call-to-define.php'], [
+				[
+					'Argument #3 ($case_insensitive) is ignored since declaration of case-insensitive constants is no longer supported.',
+					3,
+				],
+			]);
+		}
+	}
+
+}

tests/PHPStan/Rules/Functions/data/call-to-define.php

@@ -0,0 +1,6 @@
+<?php
+
+define('CaSeInSeNsItIvE', 0, true);
+define('CaSeInSeNsItIvE_IsOK', 0);
+define('all_lowercase', 1);
+define('ALL_UPPERCASE', 1);