Make widget's property sequence and length readonly.

var/Typecho/Widget.php

@@ -300,28 +300,6 @@ abstract class Typecho_Widget
         echo $args[(0 == $split ? $num : $split) - 1];
     }
 
-    /**
-     * 输出顺序值
-     *
-     * @access public
-     * @return void
-     */
-    public function sequence()
-    {
-        echo $this->sequence;
-    }
-
-    /**
-     * 输出数据长度
-     *
-     * @access public
-     * @return void
-     */
-    public function length()
-    {
-        echo $this->length;
-    }
-
     /**
      * 返回堆栈是否为空
      *
@@ -408,22 +386,6 @@ abstract class Typecho_Widget
         $this->row[$name] = $value;
     }
 
-    /**
-     * @return int
-     */
-    public function getSequence(): int
-    {
-        return $this->sequence;
-    }
-
-    /**
-     * @return int
-     */
-    public function getLength(): int
-    {
-        return $this->length;
-    }
-
     /**
      * 验证堆栈值是否存在
      *
@@ -438,6 +400,26 @@ abstract class Typecho_Widget
         return isset($this->row[$name]);
     }
 
+    /**
+     * 输出顺序值
+     *
+     * @return int
+     */
+    public function ___sequence(): int
+    {
+        return $this->sequence;
+    }
+
+    /**
+     * 输出数据长度
+     *
+     * @return int
+     */
+    public function ___length(): int
+    {
+        return $this->length;
+    }
+
     /**
      * 解析回调
      *