From e6f3ac6e0a282ef86207132c29ed57ef026b8ee1 Mon Sep 17 00:00:00 2001
From: Abdul Malik Ikhsan <samsonasik@gmail.com>
Date: Thu, 11 Sep 2025 10:41:15 +0700
Subject: [PATCH 1/7] [Php81] Add NullToStrictIntPregSlitFuncCallLimitArgRector

---
 .../Fixture/fixture.php.inc                   |  27 +++
 ...tIntPregSlitFuncCallLimitArgRectorTest.php |  28 +++
 .../config/configured_rule.php                |   9 +
 ...php => NullToStrictStringIntConverter.php} |  31 ++-
 ...trictIntPregSlitFuncCallLimitArgRector.php | 188 ++++++++++++++++++
 .../NullToStrictStringFuncCallArgRector.php   |   3 +-
 6 files changed, 275 insertions(+), 11 deletions(-)
 create mode 100644 rules-tests/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector/Fixture/fixture.php.inc
 create mode 100644 rules-tests/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector/NullToStrictIntPregSlitFuncCallLimitArgRectorTest.php
 create mode 100644 rules-tests/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector/config/configured_rule.php
 rename rules/Php81/NodeManipulator/{NullToStrictStringConverter.php => NullToStrictStringIntConverter.php} (82%)
 create mode 100644 rules/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector.php

diff --git a/rules-tests/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector/Fixture/fixture.php.inc b/rules-tests/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector/Fixture/fixture.php.inc
new file mode 100644
index 00000000000..ee7ae7a818b
--- /dev/null
+++ b/rules-tests/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector/Fixture/fixture.php.inc
@@ -0,0 +1,27 @@
+<?php
+
+namespace Rector\Tests\Php81\Rector\FuncCall\NullToStrictIntPregSlitFuncCallLimitArgRector\Fixture;
+
+class Fixture
+{
+    public function run($output)
+    {
+        preg_split('/\s/', $output, NULL, PREG_SPLIT_NO_EMPTY);
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\Php81\Rector\FuncCall\NullToStrictIntPregSlitFuncCallLimitArgRector\Fixture;
+
+class Fixture
+{
+    public function run($output)
+    {
+        preg_split('/\s/', $output, 0, PREG_SPLIT_NO_EMPTY);
+    }
+}
+
+?>
diff --git a/rules-tests/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector/NullToStrictIntPregSlitFuncCallLimitArgRectorTest.php b/rules-tests/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector/NullToStrictIntPregSlitFuncCallLimitArgRectorTest.php
new file mode 100644
index 00000000000..74c4a8b1628
--- /dev/null
+++ b/rules-tests/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector/NullToStrictIntPregSlitFuncCallLimitArgRectorTest.php
@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Tests\Php81\Rector\FuncCall\NullToStrictIntPregSlitFuncCallLimitArgRector;
+
+use Iterator;
+use PHPUnit\Framework\Attributes\DataProvider;
+use Rector\Testing\PHPUnit\AbstractRectorTestCase;
+
+final class NullToStrictIntPregSlitFuncCallLimitArgRectorTest extends AbstractRectorTestCase
+{
+    #[DataProvider('provideData')]
+    public function test(string $filePath): void
+    {
+        $this->doTestFile($filePath);
+    }
+
+    public static function provideData(): Iterator
+    {
+        return self::yieldFilesFromDirectory(__DIR__ . '/Fixture');
+    }
+
+    public function provideConfigFilePath(): string
+    {
+        return __DIR__ . '/config/configured_rule.php';
+    }
+}
diff --git a/rules-tests/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector/config/configured_rule.php b/rules-tests/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector/config/configured_rule.php
new file mode 100644
index 00000000000..7a7a0f036fa
--- /dev/null
+++ b/rules-tests/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector/config/configured_rule.php
@@ -0,0 +1,9 @@
+<?php
+
+declare(strict_types=1);
+
+use Rector\Config\RectorConfig;
+use Rector\Php81\Rector\FuncCall\NullToStrictIntPregSlitFuncCallLimitArgRector;
+
+return RectorConfig::configure()
+    ->withRules([NullToStrictIntPregSlitFuncCallLimitArgRector::class]);
diff --git a/rules/Php81/NodeManipulator/NullToStrictStringConverter.php b/rules/Php81/NodeManipulator/NullToStrictStringIntConverter.php
similarity index 82%
rename from rules/Php81/NodeManipulator/NullToStrictStringConverter.php
rename to rules/Php81/NodeManipulator/NullToStrictStringIntConverter.php
index f11cbec523e..d13a73ba9d0 100644
--- a/rules/Php81/NodeManipulator/NullToStrictStringConverter.php
+++ b/rules/Php81/NodeManipulator/NullToStrictStringIntConverter.php
@@ -6,10 +6,12 @@
 
 use PhpParser\Node\Arg;
 use PhpParser\Node\Expr;
+use PhpParser\Node\Expr\Cast\Int_ as CastInt_;
 use PhpParser\Node\Expr\Cast\String_ as CastString_;
 use PhpParser\Node\Expr\FuncCall;
 use PhpParser\Node\Expr\MethodCall;
 use PhpParser\Node\Expr\Ternary;
+use PhpParser\Node\Scalar\Int_;
 use PhpParser\Node\Scalar\InterpolatedString;
 use PhpParser\Node\Scalar\String_;
 use PHPStan\Analyser\Scope;
@@ -24,7 +26,7 @@
 use Rector\NodeTypeResolver\NodeTypeResolver;
 use Rector\PhpParser\Node\Value\ValueResolver;
 
-final readonly class NullToStrictStringConverter
+final readonly class NullToStrictStringIntConverter
 {
     public function __construct(
         private ValueResolver $valueResolver,
@@ -42,7 +44,8 @@ public function convertIfNull(
         int $position,
         bool $isTrait,
         Scope $scope,
-        ParametersAcceptor $parametersAcceptor
+        ParametersAcceptor $parametersAcceptor,
+        string $type = 'string'
     ): ?FuncCall {
         if (! isset($args[$position])) {
             return null;
@@ -50,12 +53,12 @@ public function convertIfNull(
 
         $argValue = $args[$position]->value;
         if ($this->valueResolver->isNull($argValue)) {
-            $args[$position]->value = new String_('');
+            $args[$position]->value = $type === 'string' ? new String_('') : new Int_(0);
             $funcCall->args = $args;
             return $funcCall;
         }
 
-        if ($this->shouldSkipValue($argValue, $scope, $isTrait)) {
+        if ($this->shouldSkipValue($argValue, $scope, $isTrait, $type)) {
             return null;
         }
 
@@ -67,11 +70,11 @@ public function convertIfNull(
             }
         }
 
-        if ($argValue instanceof Ternary && ! $this->shouldSkipValue($argValue->else, $scope, $isTrait)) {
+        if ($argValue instanceof Ternary && ! $this->shouldSkipValue($argValue->else, $scope, $isTrait, $type)) {
             if ($this->valueResolver->isNull($argValue->else)) {
-                $argValue->else = new String_('');
+                $argValue->else = $type === 'string' ? new String_('') : new Int_(0);
             } else {
-                $argValue->else = new CastString_($argValue->else);
+                $argValue->else = $type === 'string' ? new CastString_($argValue->else) : new CastInt_($argValue->else);
             }
 
             $args[$position]->value = $argValue;
@@ -84,15 +87,23 @@ public function convertIfNull(
         return $funcCall;
     }
 
-    private function shouldSkipValue(Expr $expr, Scope $scope, bool $isTrait): bool
+    private function shouldSkipValue(Expr $expr, Scope $scope, bool $isTrait, string $type): bool
     {
         $type = $this->nodeTypeResolver->getType($expr);
-        if ($type->isString()->yes()) {
+        if ($type->isString()->yes() && $type === 'string') {
+            return true;
+        }
+
+        if ($type->isInteger()->yes() && $type === 'int') {
             return true;
         }
 
         $nativeType = $this->nodeTypeResolver->getNativeType($expr);
-        if ($nativeType->isString()->yes()) {
+        if ($nativeType->isString()->yes() && $type === 'string') {
+            return true;
+        }
+
+        if ($nativeType->isInteger()->yes() && $type === 'int') {
             return true;
         }
 
diff --git a/rules/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector.php b/rules/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector.php
new file mode 100644
index 00000000000..7986c5a3baa
--- /dev/null
+++ b/rules/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector.php
@@ -0,0 +1,188 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Php81\Rector\FuncCall;
+
+use PhpParser\Node;
+use PhpParser\Node\Arg;
+use PhpParser\Node\Expr\FuncCall;
+use PhpParser\Node\Identifier;
+use PHPStan\Analyser\Scope;
+use PHPStan\Reflection\ClassReflection;
+use PHPStan\Reflection\FunctionReflection;
+use PHPStan\Reflection\Native\NativeFunctionReflection;
+use Rector\NodeAnalyzer\ArgsAnalyzer;
+use Rector\NodeTypeResolver\Node\AttributeKey;
+use Rector\NodeTypeResolver\PHPStan\ParametersAcceptorSelectorVariantsWrapper;
+use Rector\Php81\Enum\NameNullToStrictNullFunctionMap;
+use Rector\Php81\NodeManipulator\NullToStrictStringIntConverter;
+use Rector\Rector\AbstractRector;
+use Rector\Reflection\ReflectionResolver;
+use Rector\ValueObject\PhpVersionFeature;
+use Rector\VersionBonding\Contract\MinPhpVersionInterface;
+use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample;
+use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
+
+/**
+ * @see \Rector\Tests\Php81\Rector\FuncCall\NullToStrictIntPregSlitFuncCallLimitArgRector\NullToStrictIntPregSlitFuncCallLimitArgRectorTest
+ */
+final class NullToStrictIntPregSlitFuncCallLimitArgRector extends AbstractRector implements MinPhpVersionInterface
+{
+    public function __construct(
+        private readonly ReflectionResolver $reflectionResolver,
+        private readonly ArgsAnalyzer $argsAnalyzer,
+        private readonly NullToStrictStringIntConverter $nullToStrictStringConverter
+    ) {
+    }
+
+    public function getRuleDefinition(): RuleDefinition
+    {
+        return new RuleDefinition(
+            'Change null to strict int defined preg_split limit arg function call argument',
+            [
+                new CodeSample(
+                    <<<'CODE_SAMPLE'
+class SomeClass
+{
+    public function run()
+    {
+        preg_split('/\s/', $output, NULL, PREG_SPLIT_NO_EMPTY)
+    }
+}
+CODE_SAMPLE
+                    ,
+                    <<<'CODE_SAMPLE'
+class SomeClass
+{
+    public function run()
+    {
+        preg_split('/\s/', $output, 0, PREG_SPLIT_NO_EMPTY)
+    }
+}
+CODE_SAMPLE
+                ),
+            ]
+        );
+    }
+
+    /**
+     * @return array<class-string<Node>>
+     */
+    public function getNodeTypes(): array
+    {
+        return [FuncCall::class];
+    }
+
+    /**
+     * @param FuncCall $node
+     */
+    public function refactor(Node $node): ?Node
+    {
+        if ($this->shouldSkip($node)) {
+            return null;
+        }
+
+        $scope = $node->getAttribute(AttributeKey::SCOPE);
+        if (! $scope instanceof Scope) {
+            return null;
+        }
+
+        $args = $node->getArgs();
+        $position = $this->argsAnalyzer->hasNamedArg($args)
+            ? $this->resolveNamedPosition($args)
+            : 2;
+
+        if ($position === null) {
+            return null;
+        }
+
+        $classReflection = $scope->getClassReflection();
+        $isTrait = $classReflection instanceof ClassReflection && $classReflection->isTrait();
+
+        $functionReflection = $this->reflectionResolver->resolveFunctionLikeReflectionFromCall($node);
+        if (! $functionReflection instanceof FunctionReflection) {
+            return null;
+        }
+
+        $parametersAcceptor = ParametersAcceptorSelectorVariantsWrapper::select($functionReflection, $node, $scope);
+        $result = $this->nullToStrictStringConverter->convertIfNull(
+            $node,
+            $args,
+            (int) $position,
+            $isTrait,
+            $scope,
+            $parametersAcceptor,
+            'int'
+        );
+
+        if ($result instanceof Node) {
+            return $result;
+        }
+
+        return null;
+    }
+
+    public function provideMinPhpVersion(): int
+    {
+        return PhpVersionFeature::DEPRECATE_NULL_ARG_IN_STRING_FUNCTION;
+    }
+
+    /**
+     * @param Arg[] $args
+     * @return ?int
+     */
+    private function resolveNamedPosition(array $args): ?int
+    {
+        foreach ($args as $position => $arg) {
+            if (! $arg->name instanceof Identifier) {
+                continue;
+            }
+
+            if (! $this->isName($arg->name, 'limit')) {
+                continue;
+            }
+
+            return $position;
+        }
+
+        return null;
+    }
+
+    /**
+     * @return int[]|string[]
+     */
+    private function resolveOriginalPositions(FuncCall $funcCall, Scope $scope): array
+    {
+        $functionReflection = $this->reflectionResolver->resolveFunctionLikeReflectionFromCall($funcCall);
+        if (! $functionReflection instanceof NativeFunctionReflection) {
+            return [];
+        }
+
+        $parametersAcceptor = ParametersAcceptorSelectorVariantsWrapper::select(
+            $functionReflection,
+            $funcCall,
+            $scope
+        );
+        $functionName = $functionReflection->getName();
+        $argNames = NameNullToStrictNullFunctionMap::FUNCTION_TO_PARAM_NAMES[$functionName];
+        $positions = [];
+
+        foreach ($parametersAcceptor->getParameters() as $position => $parameterReflection) {
+            if (in_array($parameterReflection->getName(), $argNames, true)) {
+                $positions[] = $position;
+            }
+        }
+
+        return $positions;
+    }
+
+    private function shouldSkip(FuncCall $funcCall): bool
+    {
+        if (! $this->isName($funcCall, 'preg_split')) {
+            return true;
+        }
+
+        return $funcCall->isFirstClassCallable();
+    }
+}
diff --git a/rules/Php81/Rector/FuncCall/NullToStrictStringFuncCallArgRector.php b/rules/Php81/Rector/FuncCall/NullToStrictStringFuncCallArgRector.php
index b4b177ee061..08171002fbe 100644
--- a/rules/Php81/Rector/FuncCall/NullToStrictStringFuncCallArgRector.php
+++ b/rules/Php81/Rector/FuncCall/NullToStrictStringFuncCallArgRector.php
@@ -17,6 +17,7 @@
 use Rector\NodeTypeResolver\PHPStan\ParametersAcceptorSelectorVariantsWrapper;
 use Rector\Php81\Enum\NameNullToStrictNullFunctionMap;
 use Rector\Php81\NodeManipulator\NullToStrictStringConverter;
+use Rector\Php81\NodeManipulator\NullToStrictStringIntConverter;
 use Rector\Rector\AbstractRector;
 use Rector\Reflection\ReflectionResolver;
 use Rector\ValueObject\PhpVersionFeature;
@@ -32,7 +33,7 @@ final class NullToStrictStringFuncCallArgRector extends AbstractRector implement
     public function __construct(
         private readonly ReflectionResolver $reflectionResolver,
         private readonly ArgsAnalyzer $argsAnalyzer,
-        private readonly NullToStrictStringConverter $nullToStrictStringConverter
+        private readonly NullToStrictStringIntConverter $nullToStrictStringConverter
     ) {
     }
 

From 846cc8c38cd4537af00b6be65ba6652f8f16b424 Mon Sep 17 00:00:00 2001
From: Abdul Malik Ikhsan <samsonasik@gmail.com>
Date: Thu, 11 Sep 2025 10:45:30 +0700
Subject: [PATCH 2/7] rectify

---
 .../NullToStrictStringIntConverter.php        |  2 +-
 ...trictIntPregSlitFuncCallLimitArgRector.php | 38 ++-----------------
 .../NullToStrictStringFuncCallArgRector.php   |  5 +--
 3 files changed, 7 insertions(+), 38 deletions(-)

diff --git a/rules/Php81/NodeManipulator/NullToStrictStringIntConverter.php b/rules/Php81/NodeManipulator/NullToStrictStringIntConverter.php
index d13a73ba9d0..30e029cf834 100644
--- a/rules/Php81/NodeManipulator/NullToStrictStringIntConverter.php
+++ b/rules/Php81/NodeManipulator/NullToStrictStringIntConverter.php
@@ -82,7 +82,7 @@ public function convertIfNull(
             return $funcCall;
         }
 
-        $args[$position]->value = new CastString_($argValue);
+        $args[$position]->value = $type === 'string' ? new CastString_($argValue) : new CastInt_($argValue);
         $funcCall->args = $args;
         return $funcCall;
     }
diff --git a/rules/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector.php b/rules/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector.php
index 7986c5a3baa..b756e19954f 100644
--- a/rules/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector.php
+++ b/rules/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector.php
@@ -11,11 +11,9 @@
 use PHPStan\Analyser\Scope;
 use PHPStan\Reflection\ClassReflection;
 use PHPStan\Reflection\FunctionReflection;
-use PHPStan\Reflection\Native\NativeFunctionReflection;
 use Rector\NodeAnalyzer\ArgsAnalyzer;
 use Rector\NodeTypeResolver\Node\AttributeKey;
 use Rector\NodeTypeResolver\PHPStan\ParametersAcceptorSelectorVariantsWrapper;
-use Rector\Php81\Enum\NameNullToStrictNullFunctionMap;
 use Rector\Php81\NodeManipulator\NullToStrictStringIntConverter;
 use Rector\Rector\AbstractRector;
 use Rector\Reflection\ReflectionResolver;
@@ -25,6 +23,7 @@
 use Symplify\RuleDocGenerator\ValueObject\RuleDefinition;
 
 /**
+ * @see https://3v4l.org/cVPim
  * @see \Rector\Tests\Php81\Rector\FuncCall\NullToStrictIntPregSlitFuncCallLimitArgRector\NullToStrictIntPregSlitFuncCallLimitArgRectorTest
  */
 final class NullToStrictIntPregSlitFuncCallLimitArgRector extends AbstractRector implements MinPhpVersionInterface
@@ -32,7 +31,7 @@ final class NullToStrictIntPregSlitFuncCallLimitArgRector extends AbstractRector
     public function __construct(
         private readonly ReflectionResolver $reflectionResolver,
         private readonly ArgsAnalyzer $argsAnalyzer,
-        private readonly NullToStrictStringIntConverter $nullToStrictStringConverter
+        private readonly NullToStrictStringIntConverter $nullToStrictStringIntConverter
     ) {
     }
 
@@ -106,10 +105,10 @@ public function refactor(Node $node): ?Node
         }
 
         $parametersAcceptor = ParametersAcceptorSelectorVariantsWrapper::select($functionReflection, $node, $scope);
-        $result = $this->nullToStrictStringConverter->convertIfNull(
+        $result = $this->nullToStrictStringIntConverter->convertIfNull(
             $node,
             $args,
-            (int) $position,
+            $position,
             $isTrait,
             $scope,
             $parametersAcceptor,
@@ -130,7 +129,6 @@ public function provideMinPhpVersion(): int
 
     /**
      * @param Arg[] $args
-     * @return ?int
      */
     private function resolveNamedPosition(array $args): ?int
     {
@@ -149,34 +147,6 @@ private function resolveNamedPosition(array $args): ?int
         return null;
     }
 
-    /**
-     * @return int[]|string[]
-     */
-    private function resolveOriginalPositions(FuncCall $funcCall, Scope $scope): array
-    {
-        $functionReflection = $this->reflectionResolver->resolveFunctionLikeReflectionFromCall($funcCall);
-        if (! $functionReflection instanceof NativeFunctionReflection) {
-            return [];
-        }
-
-        $parametersAcceptor = ParametersAcceptorSelectorVariantsWrapper::select(
-            $functionReflection,
-            $funcCall,
-            $scope
-        );
-        $functionName = $functionReflection->getName();
-        $argNames = NameNullToStrictNullFunctionMap::FUNCTION_TO_PARAM_NAMES[$functionName];
-        $positions = [];
-
-        foreach ($parametersAcceptor->getParameters() as $position => $parameterReflection) {
-            if (in_array($parameterReflection->getName(), $argNames, true)) {
-                $positions[] = $position;
-            }
-        }
-
-        return $positions;
-    }
-
     private function shouldSkip(FuncCall $funcCall): bool
     {
         if (! $this->isName($funcCall, 'preg_split')) {
diff --git a/rules/Php81/Rector/FuncCall/NullToStrictStringFuncCallArgRector.php b/rules/Php81/Rector/FuncCall/NullToStrictStringFuncCallArgRector.php
index 08171002fbe..42abbafa38d 100644
--- a/rules/Php81/Rector/FuncCall/NullToStrictStringFuncCallArgRector.php
+++ b/rules/Php81/Rector/FuncCall/NullToStrictStringFuncCallArgRector.php
@@ -16,7 +16,6 @@
 use Rector\NodeTypeResolver\Node\AttributeKey;
 use Rector\NodeTypeResolver\PHPStan\ParametersAcceptorSelectorVariantsWrapper;
 use Rector\Php81\Enum\NameNullToStrictNullFunctionMap;
-use Rector\Php81\NodeManipulator\NullToStrictStringConverter;
 use Rector\Php81\NodeManipulator\NullToStrictStringIntConverter;
 use Rector\Rector\AbstractRector;
 use Rector\Reflection\ReflectionResolver;
@@ -33,7 +32,7 @@ final class NullToStrictStringFuncCallArgRector extends AbstractRector implement
     public function __construct(
         private readonly ReflectionResolver $reflectionResolver,
         private readonly ArgsAnalyzer $argsAnalyzer,
-        private readonly NullToStrictStringIntConverter $nullToStrictStringConverter
+        private readonly NullToStrictStringIntConverter $nullToStrictStringIntConverter
     ) {
     }
 
@@ -110,7 +109,7 @@ public function refactor(Node $node): ?Node
         $isChanged = false;
 
         foreach ($positions as $position) {
-            $result = $this->nullToStrictStringConverter->convertIfNull(
+            $result = $this->nullToStrictStringIntConverter->convertIfNull(
                 $node,
                 $args,
                 (int) $position,

From 021e7df261d7a1c1f05fa8fd4e9a361b0ef26da9 Mon Sep 17 00:00:00 2001
From: Abdul Malik Ikhsan <samsonasik@gmail.com>
Date: Thu, 11 Sep 2025 10:49:58 +0700
Subject: [PATCH 3/7] fix

---
 .../NullToStrictStringIntConverter.php        | 24 +++++++++----------
 .../ArrayKeyExistsNullToEmptyStringRector.php |  3 ++-
 2 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/rules/Php81/NodeManipulator/NullToStrictStringIntConverter.php b/rules/Php81/NodeManipulator/NullToStrictStringIntConverter.php
index 30e029cf834..bb3b58518d9 100644
--- a/rules/Php81/NodeManipulator/NullToStrictStringIntConverter.php
+++ b/rules/Php81/NodeManipulator/NullToStrictStringIntConverter.php
@@ -45,7 +45,7 @@ public function convertIfNull(
         bool $isTrait,
         Scope $scope,
         ParametersAcceptor $parametersAcceptor,
-        string $type = 'string'
+        string $targetType = 'string'
     ): ?FuncCall {
         if (! isset($args[$position])) {
             return null;
@@ -53,12 +53,12 @@ public function convertIfNull(
 
         $argValue = $args[$position]->value;
         if ($this->valueResolver->isNull($argValue)) {
-            $args[$position]->value = $type === 'string' ? new String_('') : new Int_(0);
+            $args[$position]->value = $targetType === 'string' ? new String_('') : new Int_(0);
             $funcCall->args = $args;
             return $funcCall;
         }
 
-        if ($this->shouldSkipValue($argValue, $scope, $isTrait, $type)) {
+        if ($this->shouldSkipValue($argValue, $scope, $isTrait, $targetType)) {
             return null;
         }
 
@@ -70,11 +70,11 @@ public function convertIfNull(
             }
         }
 
-        if ($argValue instanceof Ternary && ! $this->shouldSkipValue($argValue->else, $scope, $isTrait, $type)) {
+        if ($argValue instanceof Ternary && ! $this->shouldSkipValue($argValue->else, $scope, $isTrait, $targetType)) {
             if ($this->valueResolver->isNull($argValue->else)) {
-                $argValue->else = $type === 'string' ? new String_('') : new Int_(0);
+                $argValue->else = $targetType === 'string' ? new String_('') : new Int_(0);
             } else {
-                $argValue->else = $type === 'string' ? new CastString_($argValue->else) : new CastInt_($argValue->else);
+                $argValue->else = $targetType === 'string' ? new CastString_($argValue->else) : new CastInt_($argValue->else);
             }
 
             $args[$position]->value = $argValue;
@@ -82,28 +82,28 @@ public function convertIfNull(
             return $funcCall;
         }
 
-        $args[$position]->value = $type === 'string' ? new CastString_($argValue) : new CastInt_($argValue);
+        $args[$position]->value = $targetType === 'string' ? new CastString_($argValue) : new CastInt_($argValue);
         $funcCall->args = $args;
         return $funcCall;
     }
 
-    private function shouldSkipValue(Expr $expr, Scope $scope, bool $isTrait, string $type): bool
+    private function shouldSkipValue(Expr $expr, Scope $scope, bool $isTrait, string $targetType): bool
     {
         $type = $this->nodeTypeResolver->getType($expr);
-        if ($type->isString()->yes() && $type === 'string') {
+        if ($type->isString()->yes() && $targetType === 'string') {
             return true;
         }
 
-        if ($type->isInteger()->yes() && $type === 'int') {
+        if ($type->isInteger()->yes() && $targetType === 'int') {
             return true;
         }
 
         $nativeType = $this->nodeTypeResolver->getNativeType($expr);
-        if ($nativeType->isString()->yes() && $type === 'string') {
+        if ($nativeType->isString()->yes() && $targetType === 'string') {
             return true;
         }
 
-        if ($nativeType->isInteger()->yes() && $type === 'int') {
+        if ($nativeType->isInteger()->yes() && $targetType === 'int') {
             return true;
         }
 
diff --git a/rules/Php85/Rector/FuncCall/ArrayKeyExistsNullToEmptyStringRector.php b/rules/Php85/Rector/FuncCall/ArrayKeyExistsNullToEmptyStringRector.php
index b061f553d50..55ac2f33ac7 100644
--- a/rules/Php85/Rector/FuncCall/ArrayKeyExistsNullToEmptyStringRector.php
+++ b/rules/Php85/Rector/FuncCall/ArrayKeyExistsNullToEmptyStringRector.php
@@ -14,6 +14,7 @@
 use Rector\NodeTypeResolver\Node\AttributeKey;
 use Rector\NodeTypeResolver\PHPStan\ParametersAcceptorSelectorVariantsWrapper;
 use Rector\Php81\NodeManipulator\NullToStrictStringConverter;
+use Rector\Php81\NodeManipulator\NullToStrictStringIntConverter;
 use Rector\Rector\AbstractRector;
 use Rector\Reflection\ReflectionResolver;
 use Rector\ValueObject\PhpVersionFeature;
@@ -29,7 +30,7 @@ final class ArrayKeyExistsNullToEmptyStringRector extends AbstractRector impleme
 {
     public function __construct(
         private readonly ReflectionResolver $reflectionResolver,
-        private readonly NullToStrictStringConverter $nullToStrictStringConverter
+        private readonly NullToStrictStringIntConverter $nullToStrictStringConverter
     ) {
     }
 

From 36ce153958f97181b1b088f7862c3fab9ddfdcc3 Mon Sep 17 00:00:00 2001
From: Abdul Malik Ikhsan <samsonasik@gmail.com>
Date: Thu, 11 Sep 2025 10:50:25 +0700
Subject: [PATCH 4/7] fix

---
 .../NullToStrictIntPregSlitFuncCallLimitArgRector.php         | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/rules/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector.php b/rules/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector.php
index b756e19954f..db3b77d0e91 100644
--- a/rules/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector.php
+++ b/rules/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector.php
@@ -96,6 +96,10 @@ public function refactor(Node $node): ?Node
             return null;
         }
 
+        if (! isset($args[$position])) {
+            return null;
+        }
+
         $classReflection = $scope->getClassReflection();
         $isTrait = $classReflection instanceof ClassReflection && $classReflection->isTrait();
 

From b11f7e87b008ac4a029099c28a2dfe061efeb9a1 Mon Sep 17 00:00:00 2001
From: Abdul Malik Ikhsan <samsonasik@gmail.com>
Date: Thu, 11 Sep 2025 10:51:42 +0700
Subject: [PATCH 5/7] fix

---
 .../Fixture/skip_no_limit.php.inc                     | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 rules-tests/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector/Fixture/skip_no_limit.php.inc

diff --git a/rules-tests/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector/Fixture/skip_no_limit.php.inc b/rules-tests/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector/Fixture/skip_no_limit.php.inc
new file mode 100644
index 00000000000..f0ca2ac91fa
--- /dev/null
+++ b/rules-tests/Php81/Rector/FuncCall/NullToStrictIntPregSlitFuncCallLimitArgRector/Fixture/skip_no_limit.php.inc
@@ -0,0 +1,11 @@
+<?php
+
+namespace Rector\Tests\Php81\Rector\FuncCall\NullToStrictIntPregSlitFuncCallLimitArgRector\Fixture;
+
+class SkipNoLimit
+{
+    public function run($output)
+    {
+        $keywords = preg_split("/[\s,]+/", $output);
+    }
+}
\ No newline at end of file

From c4c273caf06e8a89520a0f1bf69f801ca9a733e2 Mon Sep 17 00:00:00 2001
From: Abdul Malik Ikhsan <samsonasik@gmail.com>
Date: Thu, 11 Sep 2025 10:52:37 +0700
Subject: [PATCH 6/7] Fix

---
 .../Php81/NodeManipulator/NullToStrictStringIntConverter.php | 4 +++-
 .../FuncCall/ArrayKeyExistsNullToEmptyStringRector.php       | 5 ++---
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/rules/Php81/NodeManipulator/NullToStrictStringIntConverter.php b/rules/Php81/NodeManipulator/NullToStrictStringIntConverter.php
index bb3b58518d9..10be1ac45c0 100644
--- a/rules/Php81/NodeManipulator/NullToStrictStringIntConverter.php
+++ b/rules/Php81/NodeManipulator/NullToStrictStringIntConverter.php
@@ -74,7 +74,9 @@ public function convertIfNull(
             if ($this->valueResolver->isNull($argValue->else)) {
                 $argValue->else = $targetType === 'string' ? new String_('') : new Int_(0);
             } else {
-                $argValue->else = $targetType === 'string' ? new CastString_($argValue->else) : new CastInt_($argValue->else);
+                $argValue->else = $targetType === 'string' ? new CastString_($argValue->else) : new CastInt_(
+                    $argValue->else
+                );
             }
 
             $args[$position]->value = $argValue;
diff --git a/rules/Php85/Rector/FuncCall/ArrayKeyExistsNullToEmptyStringRector.php b/rules/Php85/Rector/FuncCall/ArrayKeyExistsNullToEmptyStringRector.php
index 55ac2f33ac7..9f2f649ead6 100644
--- a/rules/Php85/Rector/FuncCall/ArrayKeyExistsNullToEmptyStringRector.php
+++ b/rules/Php85/Rector/FuncCall/ArrayKeyExistsNullToEmptyStringRector.php
@@ -13,7 +13,6 @@
 use PHPStan\Reflection\FunctionReflection;
 use Rector\NodeTypeResolver\Node\AttributeKey;
 use Rector\NodeTypeResolver\PHPStan\ParametersAcceptorSelectorVariantsWrapper;
-use Rector\Php81\NodeManipulator\NullToStrictStringConverter;
 use Rector\Php81\NodeManipulator\NullToStrictStringIntConverter;
 use Rector\Rector\AbstractRector;
 use Rector\Reflection\ReflectionResolver;
@@ -30,7 +29,7 @@ final class ArrayKeyExistsNullToEmptyStringRector extends AbstractRector impleme
 {
     public function __construct(
         private readonly ReflectionResolver $reflectionResolver,
-        private readonly NullToStrictStringIntConverter $nullToStrictStringConverter
+        private readonly NullToStrictStringIntConverter $nullToStrictStringIntConverter
     ) {
     }
 
@@ -91,7 +90,7 @@ public function refactor(Node $node): ?Node
 
         $parametersAcceptor = ParametersAcceptorSelectorVariantsWrapper::select($functionReflection, $node, $scope);
 
-        $result = $this->nullToStrictStringConverter->convertIfNull(
+        $result = $this->nullToStrictStringIntConverter->convertIfNull(
             $node,
             $args,
             $this->resolvePosition($args),

From b06559de13745dd57a427c27bdca396180a5e8c0 Mon Sep 17 00:00:00 2001
From: Abdul Malik Ikhsan <samsonasik@gmail.com>
Date: Thu, 11 Sep 2025 10:57:06 +0700
Subject: [PATCH 7/7] register

---
 config/set/php81.php | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/config/set/php81.php b/config/set/php81.php
index b87051387c8..a2f856a1c9c 100644
--- a/config/set/php81.php
+++ b/config/set/php81.php
@@ -6,6 +6,7 @@
 use Rector\Php81\Rector\Array_\FirstClassCallableRector;
 use Rector\Php81\Rector\Class_\MyCLabsClassToEnumRector;
 use Rector\Php81\Rector\Class_\SpatieEnumClassToEnumRector;
+use Rector\Php81\Rector\FuncCall\NullToStrictIntPregSlitFuncCallLimitArgRector;
 use Rector\Php81\Rector\FuncCall\NullToStrictStringFuncCallArgRector;
 use Rector\Php81\Rector\MethodCall\MyCLabsMethodCallToEnumConstRector;
 use Rector\Php81\Rector\MethodCall\RemoveReflectionSetAccessibleCallsRector;
@@ -24,6 +25,7 @@
         SpatieEnumClassToEnumRector::class,
         SpatieEnumMethodCallToEnumConstRector::class,
         NullToStrictStringFuncCallArgRector::class,
+        NullToStrictIntPregSlitFuncCallLimitArgRector::class,
         FirstClassCallableRector::class,
         RemoveReflectionSetAccessibleCallsRector::class,
     ]);