Question

这是php代码：

<?php
 if(isset($_POST['submit']) && (trim($_POST['submit']) == "Login")){ 
  if( !isset($_POST['username']) || $_POST['username']=="" ){
    echo "Attenzione, inserire l' username.";
  }else{
      require_once("dbConnection.php");
      $db_handle = new DBConnection();
      $query = "INSERT INTO studente (Nome, Cognome, Matricola, Username, Codice)
      SELECT Nome, Cognome, Matricola, Username FROM studenti_in_sessione WHERE
      studenti_in_sessione.Username = '" . $_POST["username"] . "'";
      $result = $db_handle->insertQuery($query);
      if(!empty($result)){
          echo  " 
                <script type=\"text/javascript\">  
              swal({  
     title: \'Mail inviata\',  
      text: \"Arriverà un codice all'indirizzo di posta elettronica istituzionale con le istruzioni per accedere.\",  
    type: \'success\',   
   }).then(function () {  
    document.getElementById(\"popup\").style.display = \"block\";  
    document.getElementById(\"view\").style.display = \"none\";  
    })  
              </script>  " ; 
      }else{
           echo " 
                <script type=\"text/javascript\">  
              swal({
  title: \'Errore\',
  text: \"Le credenziali sono sbagliate!\",
  type: \'error\',
})
              </script>  ";
      }
  }
  //$db_handle->disconnectDB();
}
?>

这是我的html表单：

<form action="../Slide_upload/database/signIn.php" method="POST">
            <label for="username">Username</label>
            <br/>
            <input type="text" id="username">
            <input name="submit" type="submit" value="Login">

当文字是＆＃34;形式＆＃34;并且输入不为空总是返回警告消息 Form

Warning Message

我查看并覆盖了代码，因为我可能错误地编写了变量，显然它没有犯任何错误。

Answer 1

从一开始，快速查看看起来你在用户名上的POST是空的。确保你有html元素名称'username'。

Answer 2

您忘记了表单中的name属性

<input type="text" id="username" name="username">

我不明白我在这个PHP代码中错误地认证了用户

2 个答案: