Question

我有两个不同的表供学生和老师使用（因为两者都有不同的字段），主键ID和所有页面都正确打开但我读到这是一个很好的做法，有两个不同的登录表单，所以我创建了一个用户表使用主键user_id为教师和学生提供一些共同的字段。 user_id是学生表和教师表的外键。所有pages.inc文件都包含在所有页面上。当我在user.class.php文件中提供id时，如$ id = 15;脚本工作正常，否则会在所有页面上显示错误。有人可以帮忙吗？

   ( ! ) SCREAM: Error suppression ignored for
   ( ! ) Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given 
    in C:\wamp\www\curri\web\classes\db.class.php on line 44
   Call Stack
   #    Time    Memory  Function    Location
   1    0.0008  251456  {main}( )   ..\dashboard.php:0
   2    0.0055  257088  require_once( 'C:\wamp\www\curri\web\global.inc.php' )
   ..\dashboard.php:1
   3    1.0224  378496  usertools->get( )   ..\global.inc.php:20
   4    1.0224  379224  DB->select( )   ..\usertools.class.php:56
   5    1.0229  379704  mysql_num_rows ( )  ..\db.class.php:44



   ( ! ) SCREAM: Error suppression ignored for
   ( ! ) Warning: mysql_fetch_assoc() expects parameter 1 to be resource, boolean given
    in C:\wamp\www\curri\web\classes\db.class.php on line 26
    Call Stack
   #    Time    Memory  Function    Location
   1    0.0008  251456  {main}( )   ..\dashboard.php:0
   2    0.0055  257088  require_once( 'C:\wamp\www\curri\web\global.inc.php' )
   ..\dashboard.php:1
   3    1.0224  378496  usertools->get( )   ..\global.inc.php:20
   4    1.0224  379224  DB->select( )   ..\usertools.class.php:56
   5    1.0232  379656  DB->processRowSet( )    ..\db.class.php:47
   6    1.0232  379912  mysql_fetch_assoc ( )   ..\db.class.php:26

这些文件包含在所有页面上。

global.inc.php ----

<?php  
require_once ("classes/user.class.php");  
require_once ("classes/usertools.class.php");  
require_once ("classes/db.class.php");  

$db = new DB();  
$db->connect();  

$usertools = new usertools();  

session_start();  

if(isset($_SESSION['logged_in'])) {  
    $user = unserialize($_SESSION['user']);  
    $_SESSION['user'] = serialize($usertools->get($user->id));  
}  
?>

usertools.class.php -----

<?php  
require_once ("user.class.php");  
require_once ("db.class.php");

class usertools {  

 public function login($username, $password, $usertype)  
 {  
  global $table;    
  $result = mysql_query("SELECT * FROM $table WHERE user_name='$username' 
      && password='$password' && user_type='$usertype'");  
    if(mysql_num_rows($result) > 0)  
    {    
    $_SESSION["user"] = serialize(new User(mysql_fetch_assoc($result)));  
            $_SESSION["login_time"] = time();  
            $_SESSION["logged_in"] = 1;  
            return true;  
        }else{  
            return false;  
        }  
    }  

    //returns a User object. Takes the users id as an input  
    public function get($id)  
    {  
        $db = new DB();  
        $result = $db->select('user', "user_id = $id");  

        return new User($result);  
    }  
} 

?>

user.class.php ---

<?php  
require_once ("db.class.php");  

class User {  
    public $id;
              .
              .
            public $usertype;

    function __construct($data) {  
          $this->id = (isset($data['id'])) ? $data['id'] : "";
        .
                    .
      $this->usertype = (isset($data['user_type'])) ? $data['user_type'] : "";
    }  

    public function saveteacher($isNewUser = false) {  

       global $table;
        $db = new DB();  

                 $data = array( 
                "user_name" => "'$this->username'",
                "email" => "'$this->email'",  
                 .
                                     .
                                     .    
                "user_type" => "'$this->usertype'" );
             $this->id = $db->insert($data, 'user');
            $data1 = array(
             "user_id" => "'$this->id'",
             "teacher_id" => "'$this->teacher_id'",
                                .
                                .                   
                             "subject" => "'$this->subject'",
              );

            $db->insert($data1, 'teachers');
        }  
        return true;  
    }  

    public function savestudent($isNewUser = false) {  

    }


}  

?>

db.class.php ---

<?php  
 class DB {  
    protected $db_host = "localhost"; 
    protected $db_user = "root";  
    protected $db_password = "";  
    protected $db_name = "db_name";
        public $table;

    public function connect() {  
    $conn= mysql_connect($this->db_host, $this->db_user, $this->db_password);  
    mysql_select_db($this->db_name);  
    return true;  
    }  

        public function processRowSet($rowSet, $singleRow=false)  
    {  
        $resultArray = array();  
        while($row = mysql_fetch_assoc($rowSet))  
        {  
          array_push($resultArray, $row);  
        }  

        if($singleRow === true)  
            return $resultArray[0];  
        return $resultArray;  
    }  

       public function select($table, $where) {  

        $sql = "SELECT * FROM $table WHERE $where";  
        $result = mysql_query($sql);  
        if(mysql_num_rows($result) == 1)  
        return $this->processRowSet($result, true);  
        return $this->processRowSet($result);  
          }  
        }       

?>

Answer 1

您似乎正在使用尖叫扩展。

从手册：

尖叫扩展可以禁用静音错误控制操作符，以便报告所有错误。此功能由ini设置控制。

Scream是调试的扩展，旨在显示尽可能多的错误消息。这是通过忽略@运算符并始终具有最高的error_reporating级别来完成的。（无论您的error_reporting设置如何）。因此，您必须在php.ini中停用扩展名：

scream.enabled = off

BTW：我不会更新有170个代码错误的网站的服务器。现在这是一颗定时炸弹。最好将它们逐站点迁移到新的PHP版本。也许在迁移过程中有两台服务器并行。

脚本找不到id字段值

1 个答案: