diff --git a/phpstan.neon b/phpstan.neon
index 429e9f6e8d5..854020bdd80 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -340,3 +340,7 @@ parameters:
             identifier: rector.upgradeDowngradeRegisteredInSet
             count: 1
             path: rules/Php74/Rector/Double/RealToFloatTypeCastRector.php
+
+        -
+            message: '#Offset float\|int\|string might not exist on string#'
+            path: rules/Php70/EregToPcreTransformer.php
diff --git a/rules/CodingStyle/Rector/Stmt/NewlineAfterStatementRector.php b/rules/CodingStyle/Rector/Stmt/NewlineAfterStatementRector.php
index b89d65724ef..857ca35b2cb 100644
--- a/rules/CodingStyle/Rector/Stmt/NewlineAfterStatementRector.php
+++ b/rules/CodingStyle/Rector/Stmt/NewlineAfterStatementRector.php
@@ -129,7 +129,9 @@ private function processAddNewLine(
                 continue;
             }
 
+            /** @var Stmt $stmt */
             $endLine = $stmt->getEndLine();
+            /** @var Stmt $nextStmt */
             $line = $nextStmt->getStartLine();
             $rangeLine = $line - $endLine;
 
diff --git a/rules/Php70/Rector/FuncCall/CallUserMethodRector.php b/rules/Php70/Rector/FuncCall/CallUserMethodRector.php
index 986a476dae1..3cd9809bb2c 100644
--- a/rules/Php70/Rector/FuncCall/CallUserMethodRector.php
+++ b/rules/Php70/Rector/FuncCall/CallUserMethodRector.php
@@ -67,6 +67,10 @@ public function refactor(Node $node): ?Node
             return null;
         }
 
+        if (! isset(self::OLD_TO_NEW_FUNCTIONS[$this->getName($node)])) {
+            return null;
+        }
+
         $newName = self::OLD_TO_NEW_FUNCTIONS[$this->getName($node)];
         $node->name = new Name($newName);
 
diff --git a/rules/Php73/Rector/FuncCall/ArrayKeyFirstLastRector.php b/rules/Php73/Rector/FuncCall/ArrayKeyFirstLastRector.php
index 2350eec1bbe..63a65592cf8 100644
--- a/rules/Php73/Rector/FuncCall/ArrayKeyFirstLastRector.php
+++ b/rules/Php73/Rector/FuncCall/ArrayKeyFirstLastRector.php
@@ -147,6 +147,10 @@ private function processArrayKeyFirstLast(
                 continue;
             }
 
+            if (! isset(self::PREVIOUS_TO_NEW_FUNCTIONS[$this->getName($stmt->expr)])) {
+                continue;
+            }
+
             $newName = self::PREVIOUS_TO_NEW_FUNCTIONS[$this->getName($stmt->expr)];
             $keyFuncCall->name = new Name($newName);
 
diff --git a/rules/Php81/Rector/FuncCall/NullToStrictStringFuncCallArgRector.php b/rules/Php81/Rector/FuncCall/NullToStrictStringFuncCallArgRector.php
index 212d4a4292b..b4b177ee061 100644
--- a/rules/Php81/Rector/FuncCall/NullToStrictStringFuncCallArgRector.php
+++ b/rules/Php81/Rector/FuncCall/NullToStrictStringFuncCallArgRector.php
@@ -142,7 +142,7 @@ public function provideMinPhpVersion(): int
     private function resolveNamedPositions(FuncCall $funcCall, array $args): array
     {
         $functionName = $this->getName($funcCall);
-        $argNames = NameNullToStrictNullFunctionMap::FUNCTION_TO_PARAM_NAMES[$functionName];
+        $argNames = NameNullToStrictNullFunctionMap::FUNCTION_TO_PARAM_NAMES[$functionName] ?? [];
         $positions = [];
 
         foreach ($args as $position => $arg) {