From 333a052c879cd6940bca8b18c6e39f8a22ad67fc Mon Sep 17 00:00:00 2001
From: Abdul Malik Ikhsan <samsonasik@gmail.com>
Date: Mon, 30 Mar 2026 18:14:47 +0700
Subject: [PATCH] [DeadCode] Handle crash on multi elseif on
 RemoveDeadIfBlockRector

---
 .../multi_elseif_with_binaryop.php.inc        | 33 +++++++++++++++++++
 .../Rector/If_/RemoveDeadIfBlockRector.php    |  4 +--
 2 files changed, 35 insertions(+), 2 deletions(-)
 create mode 100644 rules-tests/DeadCode/Rector/If_/RemoveDeadIfBlockRector/Fixture/multi_elseif_with_binaryop.php.inc

diff --git a/rules-tests/DeadCode/Rector/If_/RemoveDeadIfBlockRector/Fixture/multi_elseif_with_binaryop.php.inc b/rules-tests/DeadCode/Rector/If_/RemoveDeadIfBlockRector/Fixture/multi_elseif_with_binaryop.php.inc
new file mode 100644
index 00000000000..675d2959501
--- /dev/null
+++ b/rules-tests/DeadCode/Rector/If_/RemoveDeadIfBlockRector/Fixture/multi_elseif_with_binaryop.php.inc
@@ -0,0 +1,33 @@
+<?php
+
+namespace Rector\Tests\DeadCode\Rector\If_\RemoveDeadIfBlockRector\Fixture;
+
+class MultiElseIfWithBinaryOp
+{
+    public function run($value, $flag)
+    {
+        if ($flag) {
+        } elseif ($value === 2) {
+        } elseif ($value === 3 || $value === 4) {
+            echo "matched";
+        }
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\DeadCode\Rector\If_\RemoveDeadIfBlockRector\Fixture;
+
+class MultiElseIfWithBinaryOp
+{
+    public function run($value, $flag)
+    {
+        if (!$flag && ($value === 3 || $value === 4)) {
+            echo "matched";
+        }
+    }
+}
+
+?>
diff --git a/rules/DeadCode/Rector/If_/RemoveDeadIfBlockRector.php b/rules/DeadCode/Rector/If_/RemoveDeadIfBlockRector.php
index 5240e01f930..b581deb9a06 100644
--- a/rules/DeadCode/Rector/If_/RemoveDeadIfBlockRector.php
+++ b/rules/DeadCode/Rector/If_/RemoveDeadIfBlockRector.php
@@ -102,12 +102,12 @@ public function refactor(Node $node): int|null|If_
         }
 
         foreach ($node->elseifs as $elseif) {
-            $keep_elseifs = array_filter(
+            $keep_elseifs = array_values(array_filter(
                 $node->elseifs,
                 fn (ElseIf_ $elseif): bool => $elseif->stmts !== [] || $this->sideEffectNodeDetector->detect(
                     $elseif->cond
                 )
-            );
+            ));
             if (count($node->elseifs) !== count($keep_elseifs)) {
                 $node->elseifs = $keep_elseifs;
                 return $this->refactor($node) ?? $node;