[Scoped] Fixing downgrade part 2 (#1597)

* [Scoped] Fixing downgrade part 2

* test

rules-tests/DowngradePhp80/Rector/FuncCall/DowngradeArrayFilterNullableCallbackRector/Fixture/skip_callback_second_arg_with_closure.php.inc

@@ -0,0 +1,13 @@
+<?php
+
+namespace Rector\Tests\DowngradePhp80\Rector\FuncCall\DowngradeArrayFilterNullableCallbackRector\Fixture;
+
+class SkipCallbackSecondArgWithClosure
+{
+    public function run(array $data)
+    {
+        array_filter($data, function ($v, $k) { return ! empty ($v); }, ARRAY_FILTER_USE_BOTH);
+    }
+}
+
+?>

rules/DowngradePhp80/Rector/FuncCall/DowngradeArrayFilterNullableCallbackRector.php

@@ -6,9 +6,11 @@
 
 use PhpParser\Node;
 use PhpParser\Node\Arg;
+use PhpParser\Node\Expr;
 use PhpParser\Node\Expr\ArrowFunction;
 use PhpParser\Node\Expr\BinaryOp\Identical;
 use PhpParser\Node\Expr\BooleanNot;
+use PhpParser\Node\Expr\Closure;
 use PhpParser\Node\Expr\ConstFetch;
 use PhpParser\Node\Expr\Empty_;
 use PhpParser\Node\Expr\FuncCall;
@@ -17,7 +19,7 @@
 use PhpParser\Node\Identifier;
 use PhpParser\Node\Name;
 use PhpParser\Node\Param;
-use PHPStan\Type\MixedType;
+use PhpParser\Node\Scalar\String_;
 use Rector\Core\Rector\AbstractRector;
 use Rector\NodeTypeResolver\Node\AttributeKey;
 use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
@@ -103,8 +105,7 @@ public function refactor(Node $node): FuncCall|Ternary|null
             return $node;
         }
 
-        $type = $this->nodeTypeResolver->getType($args[1]->value);
-        if (! $type instanceof MixedType) {
+        if ($this->shouldSkipSecondArg($args[1]->value)) {
             return null;
         }
 
@@ -115,6 +116,11 @@ public function refactor(Node $node): FuncCall|Ternary|null
         return $node;
     }
 
+    private function shouldSkipSecondArg(Expr $expr): bool
+    {
+        return in_array($expr::class, [String_::class, Closure::class, ArrowFunction::class], true);
+    }
+
     /**
      * @param Arg[] $args
      */