From 848c763c0dfa63ea33a4207074377fa56c23cec6 Mon Sep 17 00:00:00 2001
From: tianfenghan <rango@swoole.com>
Date: Sun, 19 Jul 2026 11:09:22 +0800
Subject: [PATCH] test(compiler): cover expression variable names

---
 phpunit/code/variable-variable-function-call.php | 12 ++++++++++++
 phpunit/src/VariableVariableTest.php             |  5 +++++
 src/CompilerBase.php                             |  2 +-
 3 files changed, 18 insertions(+), 1 deletion(-)
 create mode 100644 phpunit/code/variable-variable-function-call.php

diff --git a/phpunit/code/variable-variable-function-call.php b/phpunit/code/variable-variable-function-call.php
new file mode 100644
index 00000000..26fd0ef1
--- /dev/null
+++ b/phpunit/code/variable-variable-function-call.php
@@ -0,0 +1,12 @@
+<?php
+
+function variable_name(): string
+{
+    return 'hello';
+}
+
+function variable_variable_with_function_call(): void
+{
+    ${variable_name()} = 'world';
+    echo $hello;
+}
diff --git a/phpunit/src/VariableVariableTest.php b/phpunit/src/VariableVariableTest.php
index f3ae8102..8afce89b 100644
--- a/phpunit/src/VariableVariableTest.php
+++ b/phpunit/src/VariableVariableTest.php
@@ -6,4 +6,9 @@ class VariableVariableTest extends \BaseTest
     {
         $this->exec('The `$$` syntax is not supported', 'variable-variable-arraydim.php');
     }
+
+    public function testVariableVariableWithFunctionCallThrowsUnsupportedError(): void
+    {
+        $this->exec('The `$$` syntax is not supported', 'variable-variable-function-call.php');
+    }
 }
diff --git a/src/CompilerBase.php b/src/CompilerBase.php
index 6381503d..eff7eab5 100644
--- a/src/CompilerBase.php
+++ b/src/CompilerBase.php
@@ -1273,7 +1273,7 @@ class CompilerBase implements PropertyAccessContext
 
     protected function parseVariable(Variable $expr): string
     {
-        if (is_object($expr->name)) {
+        if (!is_string($expr->name)) {
             $this->fatalError($expr, 'The `$$` syntax is not supported');
         }
         if ($this->isSuperGlobal($expr->name)) {