Regression tests

Closes phpstan/phpstan#2420
Closes phpstan/phpstan#2718
Closes phpstan/phpstan#3126
Closes phpstan/phpstan#4586
Closes phpstan/phpstan#4887

tests/PHPStan/Analyser/NodeScopeResolverTest.php

@@ -665,6 +665,11 @@ public function dataFileAsserts(): iterable
 		yield from $this->gatherAssertTypes(__DIR__ . '/data/template-null-bound.php');
 		yield from $this->gatherAssertTypes(__DIR__ . '/data/bug-4592.php');
 		yield from $this->gatherAssertTypes(__DIR__ . '/data/bug-4903.php');
+		yield from $this->gatherAssertTypes(__DIR__ . '/data/bug-2420.php');
+		yield from $this->gatherAssertTypes(__DIR__ . '/data/bug-2718.php');
+		yield from $this->gatherAssertTypes(__DIR__ . '/data/bug-3126.php');
+		yield from $this->gatherAssertTypes(__DIR__ . '/data/bug-4586.php');
+		yield from $this->gatherAssertTypes(__DIR__ . '/data/bug-4887.php');
 	}
 
 	/**

tests/PHPStan/Analyser/data/bug-2420.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace Bug2420;
+
+use function PHPStan\Testing\assertType;
+
+class HelloWorld
+{
+	const CONFIG = [
+		0 => false,
+		1 => false,
+	];
+
+	public function sayHello(int $key): void
+	{
+		$config = self::CONFIG[$key] ?? true;
+		assertType('bool', $config);
+	}
+}
+
+class HelloWorld2
+{
+	const CONFIG = [
+		0 => ['foo' => false],
+		1 => ['foo' => false],
+	];
+
+	public function sayHello(int $key): void
+	{
+		$config = self::CONFIG[$key]['foo'] ?? true;
+		assertType('bool', $config);
+	}
+}

tests/PHPStan/Analyser/data/bug-2718.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace Bug2218;
+
+use function PHPStan\Testing\assertType;
+
+class Foo
+{
+
+	public function doFoo()
+	{
+		$fun = function (): array {
+			return [
+				['group_id' => 'a', 'user_id' => 'id1'],
+				['group_id' => 'a', 'user_id' => 'id2'],
+				['group_id' => 'a', 'user_id' => 'id3'],
+				['group_id' => 'b', 'user_id' => 'id4'],
+				['group_id' => 'b', 'user_id' => 'id5'],
+				['group_id' => 'b', 'user_id' => 'id6'],
+			];
+		};
+
+		$orders = $fun();
+
+		$result = [];
+		foreach ($orders as $order) {
+			assertType('bool', isset($result[$order['group_id']]['users']));
+			if (isset($result[$order['group_id']]['users'])) {
+				$result[$order['group_id']]['users'][] = $order['user_id'];
+				continue;
+			}
+
+			$result[$order['group_id']] = [
+				'users' => [
+					$order['user_id'],
+				],
+			];
+		}
+	}
+
+}

tests/PHPStan/Analyser/data/bug-3126.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace Bug3126;
+
+use function PHPStan\Testing\assertType;
+
+class Foo
+{
+
+	/**
+	 * @param array<int,string> $input
+	 */
+	function failure(array $input): void {
+		$results = [];
+
+		foreach ($input as $keyOne => $layerOne) {
+			assertType('bool', isset($results[$keyOne]['name']));
+			if(isset($results[$keyOne]['name']) === false) {
+				$results[$keyOne]['name'] = $layerOne;
+			}
+		}
+	}
+
+	/**
+	 * @param array<int,string> $input
+	 */
+	function no_failure(array $input): void {
+		$results = [];
+
+		foreach ($input as $keyOne => $layerOne) {
+			if(isset($results[$keyOne]) === false) {
+				$results[$keyOne] = $layerOne;
+			}
+		}
+	}
+
+}

tests/PHPStan/Analyser/data/bug-4586.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace Bug4586;
+
+use function PHPStan\Testing\assertType;
+
+class HelloWorld
+{
+	public function sayHello(): void
+	{
+		assertType('bool', isset($_SESSION));
+	}
+}

tests/PHPStan/Analyser/data/bug-4887.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace Bug4887;
+
+use function PHPStan\Testing\assertType;
+
+assertType('bool', isset($_SESSION));
+
+$foo = ['$_REQUEST' => $_REQUEST,
+	'$_COOKIE'  => $_COOKIE,
+	'$_SERVER'  => $_SERVER,
+	'$GLOBALS'  => $GLOBALS,
+	'$SESSION'  => isset($_SESSION) ? $_SESSION : NULL];
+
+foreach ($foo as $data)
+{
+	assertType('bool', is_array($data));
+}