From feef37d28ff71fa1a51697e0ba5f718d56cdf7c4 Mon Sep 17 00:00:00 2001
From: tianfenghan <rango@swoole.com>
Date: Tue, 12 May 2026 18:23:38 +0800
Subject: [PATCH] =?UTF-8?q?fix(php):=20=E8=A7=A3=E5=86=B3=E6=95=B0?=
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- 在数组维度获取为空时添加致命错误提示
- 添加对 unset($arr[]) 语法的错误检测
- 新增对应的单元测试验证空数组维度取消设置的错误情况
- 创建测试文件验证数组取消设置的边界情况
---
 phpunit/code/unset-array-dim-fetch-empty.php | 6 ++++++
 phpunit/src/UndefineTest.php                 | 7 ++++++-
 src/Php/CompilerBase.php                     | 5 ++++-
 3 files changed, 16 insertions(+), 2 deletions(-)
 create mode 100644 phpunit/code/unset-array-dim-fetch-empty.php

diff --git a/phpunit/code/unset-array-dim-fetch-empty.php b/phpunit/code/unset-array-dim-fetch-empty.php
new file mode 100644
index 00000000..67d9b0f1
--- /dev/null
+++ b/phpunit/code/unset-array-dim-fetch-empty.php
@@ -0,0 +1,6 @@
+<?php
+function main()
+{
+    $arr = [];
+    unset($arr[]);
+}
\ No newline at end of file
diff --git a/phpunit/src/UndefineTest.php b/phpunit/src/UndefineTest.php
index aa44ba58..ab7ce18a 100644
--- a/phpunit/src/UndefineTest.php
+++ b/phpunit/src/UndefineTest.php
@@ -7,4 +7,9 @@ class UndefineTest extends \BaseTest
         $this->exec('The variable `$u1` is undefined', 'undefined-vars-01.php');
         $this->exec('Unsupported unset type `Expr_FuncCall`', 'unset-01.php');
     }
-}
+
+    public function testUnsetEmptyArrayDimFetch()
+    {
+        $this->exec('Cannot use [] for array unset', 'unset-array-dim-fetch-empty.php');
+    }
+}
\ No newline at end of file
diff --git a/src/Php/CompilerBase.php b/src/Php/CompilerBase.php
index c4aca94c..0c4386a1 100644
--- a/src/Php/CompilerBase.php
+++ b/src/Php/CompilerBase.php
@@ -4037,6 +4037,9 @@ class CompilerBase extends \PhpAot\Core\Translator
         $lines = [];
         foreach ($vars as $var) {
             if ($this->isArrayDimFetch($var)) {
+                if ($var->dim === null) {
+                    $this->fatalError($var, 'Cannot use [] for array unset');
+                }
                 $array = $this->parseIdentifier($var->var);
                 $dim = $this->parseIdentifier($var->dim);
                 $lines[] = $array . '.offsetUnset(' . $dim . ');';
@@ -5781,4 +5784,4 @@ class CompilerBase extends \PhpAot\Core\Translator
 
         return $tmpVar;
     }
-}
+}
\ No newline at end of file