update README.md.

Signed-off-by: 烟雨如花 <2324281453@qq.com>

README.md

@@ -353,46 +353,32 @@ decimal -> DECIMAL(precision, scale)
 ### 全局变量对应关系
 
 1. `$_W` (WeEngine全局配置):
-```python
-class WeConfig:
-    def __init__(self, request: Request):
-        self.config = {}        # 系统配置
-        self.uniacid = None     # 当前公众号ID (从请求参数i获取)
-        self.acid = None        # 当前账号ID
-        self.uid = None         # 当前用户ID
-        self.timestamp = int(time.time())  # 当前时间戳
-        self.clientip = request.client.host  # 客户端IP
-        self.container = "wxapp"  # 容器类型
-        self.isajax = "XMLHttpRequest" in request.headers.get("X-Requested-With", "")
-        self.ispost = request.method == "POST"
-        self.sitescheme = "https://" if request.url.scheme == "https" else "http://"
-        self.script_name = request.url.path
-        self.siteroot = str(request.base_url)
-        self.attachurl = f"{self.siteroot}attachment/"
+```php
+$_W = array(
+    'config' => array(),     // 系统配置信息
+    'timestamp' => time(),   // 当前时间戳
+    'charset' => 'utf8',     // 字符集
+    'clientip' => '',        // 客户端IP
+    'uniacid' => 0,         // 当前统一公众号ID
+    'acid' => 0,            // 当前账号ID
+    'uid' => 0,             // 当前用户ID
+    'isajax' => false,      // 是否AJAX请求
+    'ispost' => false,      // 是否POST请求
+    'siteroot' => '',       // 站点根目录URL
+    'siteurl' => '',        // 当前URL
+    'attachurl' => '',      // 附件URL
+    'setting' => array(),   // 站点设置
+    'module' => array()     // 当前模块信息
+);
 ```
 
 2. `$_GPC` (全局请求参数):
-```python
-async def get_all_params(request: Request) -> dict:
-    """合并所有请求参数"""
-    # 查询参数
-    params = dict(request.query_params)
-    
-    # POST/表单数据
-    try:
-        form = await request.form()
-        params.update(dict(form))
-    except:
-        try:
-            json_data = await request.json()
-            params.update(json_data)
-        except:
-            pass
-            
-    # Cookie数据
-    params.update(dict(request.cookies))
-    
-    return params
+```php
+$_GPC = array_merge(
+    $_GET,      // GET参数
+    $_POST,     // POST参数
+    $_COOKIE    // COOKIE数据
+);
 ```
 
 ### 迁移方法步骤