Answer 1

Answer 2

你好，你初始化了一个新的会话。以下对我来说非常合适。

  public static function insert_search($pdo)
  {
    @session_start();
    $ip = $_SERVER['REMOTE_ADDR'];
    $username = $_SESSION['username'];
    //$username = self::username();
    $date = date('Y-m-d');
    //Adding the total searches for the logged in user 
    $query = $pdo->query("UPDATE  `users` SET  `total_searches` = `total_searches` +1 WHERE username = '$username'");
  }

/* What you could potentially do is the following.
Make sure if you're doing it the procedural way
you put @session_start(); at the top of the page */

@session_start();
$sql = "UPDATE tbl SET amt_field ='amt_field' +1 WHERE username ='" .mysql_real_escape_string($_SESSION['username']). "'";
        mysql_select_db('db',$con);
        mysql_query($sql,$con);