feat(compiler): 添加对变量表达式检查和无变量捕获的支持

- 在方法调用解析中添加了变量表达式检查功能
- 实现了未定义变量错误提示机制
- 更新异常捕获解析以支持无变量名的捕获语法
- 添加了临时变量名生成器来处理匿名捕获变量
- 新增 try-catch-2 测试用例验证捕获语法兼容性

.gitignore

@@ -7,5 +7,6 @@
 /vendor
 /tmp
 /projects/wordpress
+/projects/workerman
 /.php-cs-fixer.cache
 *.o

src/Php/CompilerBase.php

@@ -3189,6 +3189,10 @@ class CompilerBase extends \PhpAot\Core\Translator
 
     protected function parseMethodCall(Node\Expr\MethodCall $expr): string
     {
+        if ($this->isVarExpr($expr->var)) {
+            $this->errorUndefinedVariable($expr->var);
+        }
+
         $object = $this->convertToObject($expr->var);
         if ($this->isTypedObject($object)) {
             $class = $this->getObjectType($object);
@@ -3451,10 +3455,10 @@ class CompilerBase extends \PhpAot\Core\Translator
         return $code;
     }
 
-    protected function parseCatch(mixed $catch, string $exVar): string
+    protected function parseCatch(Node\Stmt\Catch_ $catch, string $exVar): string
     {
         $types = $catch->types;
-        $var   = $this->parseIdentifier($catch->var);
+        $var = $catch->var ? $this->parseIdentifier($catch->var) : $this->genTmpVarName();
         if (!$this->hasVar($var)) {
             $this->addLocalVar($var, self::TYPE_OBJECT);
         }

tests/aot/try-catch-2.phpt

@@ -0,0 +1,14 @@
+--TEST--
+try catch 2
+--FILE--
+<?php
+function main() {
+    try {
+        throw new Exception('test error');
+    } catch (Exception) {
+        echo "Caught exception\n";
+    }
+}
+?>
+--EXPECT--
+Caught exception