title: Call to undefined function MYSQL_NUM_ROWS()
body: <p>i am trying to validate a login with php but am getting this error : </p>
  
  <blockquote>
    <p>Fatal error: Uncaught Error: Call to undefined function MYSQL_NUM_ROWS() in /opt/lampp/htdocs/social/index.php:100 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/social/index.php on line 100</p>
  </blockquote>
  
  <p>here is my code</p>
  
  <pre><code>if(isset($_POST['login'])){
  
          $studentid = $_POST['studid'];  
          $pass = $_POST['password'];
  
          $query2 = mysqli_query($con, "SELECT * FROM members WHERE student_id = '$studentid' AND password = '$pass' ") or die (mysqli_connect_error());
  
          while($studid = mysqli_fetch_object($query2))
              {
              echo "$studid-&gt;member_id";
              }
              $numberOfRows = MYSQL_NUM_ROWS($query2);
              if ($numberOfRows == 0)
                  {
  
                  }
              else if ($numberOfRows &gt; 0){
                      $wewness = mysql_query("SELECT * FROM members WHERE student_id = $studentid")or die(mysql_error());
                      $getid = mysql_fetch_array($wewness);
                      if($getid['account_status']==0){
                          $_SESSION['login'] = 'maybe';
                          $_SESSION['member_id'] = $getid['member_id'];
                          $_SESSION['studentid'] = $getid['student_id'];
                          header('location:registerexec.php');
                      }elseif($getid['account_status']==2){
                          $_SESSION['login'] = 'true';
                          $_SESSION['member_id'] = $getid['member_id'];
                          $_SESSION['studentid'] = $getid['student_id'];
                          header('location:hometest.php');
  
                      }elseif($getid['account_status']==1){
                          $_SESSION['login'] = 'maybe';
                          $_SESSION['member_id'] = $getid['member_id'];
                          $_SESSION['studentid'] = $getid['student_id'];
                          header('location:fill.php');
  
                      }
                  }
              }
  </code></pre>