MRBS 1.12.2 等保2.0二级整改完整提交

包含：登录失败锁定、90天密码有效期、30分钟会话超时、
强制改密、登录审计日志、屏幕水印、企业背景图、
备案信息固定底部、favicon、JS空集合保护、
会话过期体验优化（403 JSON）、display_errors 关闭、
固定 key 根治 Integrity check failed 等全部改动

注意：config.inc.php/.htaccess/.user.ini 含敏感信息，
通过 .gitignore 排除，勿推送到公开仓库。

lib/MRBS/DB/DBStatement.php

@@ -0,0 +1,78 @@
+<?php
+declare(strict_types=1);
+namespace MRBS\DB;
+
+use PDO;
+use PDOStatement;
+
+
+class DBStatement
+{
+  protected $db_object = null;
+  protected $statement = null;
+
+
+  public function __construct(DB $db_obj, PDOStatement $sth)
+  {
+    $this->db_object = $db_obj;
+    $this->statement = $sth;
+  }
+
+
+  /**
+   * Fetch the next row from a result set
+   *
+   * @return mixed[]|false An array indexed by column number as returned in the result set, starting at column 0,
+   * or FALSE if there are no more rows.
+   */
+  public function next_row()
+  {
+    return $this->statement->fetch(PDO::FETCH_NUM);
+  }
+
+
+  /**
+   * Returns the next row from a statement as an associative array.
+   *
+   * @return array<string,mixed>|false The next row indexed by column name, or FALSE if there are no more rows.
+   */
+  public function next_row_keyed()
+  {
+    return $this->statement->fetch(PDO::FETCH_ASSOC);
+  }
+
+
+  /**
+   * Return all the rows from a statement object, as an array of arrays keyed on the column name.
+   */
+  public function all_rows_keyed() : array
+  {
+    $result = array();
+
+    while (false !== ($row = $this->next_row_keyed()))
+    {
+      $result[] = $row;
+    }
+
+    return $result;
+  }
+
+  /**
+   * Returns the number of rows affected by the last SQL statement.
+   *
+   * For DELETE, INSERT, or UPDATE statements the number of rows affected is returned, though note that this depends
+   * on the setting of Pdo\Mysql::ATTR_FOUND_ROWS for MySQL.
+   *
+   * For statements that produce result sets, such as SELECT, the behaviour is undefined and can be different for each driver.
+   */
+  public function count() : int
+  {
+    return $this->statement->rowCount();
+  }
+
+  // Returns the number of fields in a statement.
+  public function num_fields() : int
+  {
+    return $this->statement->columnCount();
+  }
+}