Uncaught Error: Aufruf zu undefinierter Funktion mysql_connect() [Duplicate Online error]

Ich habe Anpassungen in meiner Online-Website vorgenommen. aber als ich auf den login klickte, zeigte es immer diesen fehler an. Ich habe ein Problem mit diesem, wenn ich diese Codes in wampserver verwenden, ist es in Ordnung und es gibt keinen Fehler. aber wenn ich versuche es online zu gehen gibt es einen Fehler das ist der Fehler: Fataler Fehler: Uncaught Fehler: Aufruf zu undefinierter Funktion mysql_connect() in /storage/ssd5/266/3359266/public_html/dbconnect.php:11 Stack Trace: # 0 /storage/ssd5/266/3359266/public_html/register.php(7): include_once() # 1 {main} geworfen in /storage/ssd5/266/3359266/public_html/dbconnect.php in Zeile 11Uncaught Error: Aufruf zu undefinierter Funktion mysql_connect() [Duplicate Online error]

Datenbankverbindung:

<?php 

    // this will avoid mysql_connect() deprecation error. 
    // but I strongly suggest you to use PDO or MySQLi. 

    define('DBHOST', 'localhost'); 
    define('DBUSER', 'id3359266_root'); 
    define('DBPASS', '123456789'); 
    define('DBNAME', 'id3359266_dbtest'); 

    $conn = mysql_connect(DBHOST,DBUSER,DBPASS); 
    $dbcon = mysql_select_db(DBNAME); 

    if (!$conn) { 
     die("Connection failed : " . mysql_error()); 
    } 

    if (!$dbcon) { 
     die("Database Connection failed : " . mysql_error()); 
    } 
    ?>

<?php 
    ob_start(); 
    session_start(); 
    require_once 'dbconnect.php'; 

    // it will never let you open index(login) page if session is set 
    if (isset($_SESSION['user'])!="") { 
     header("Location: home.php"); 
     exit; 
    } 


    if(isset($_POST['btn-login'])) { 

     // prevent sql injections/ clear user invalid inputs 
     $student_number = trim($_POST['student_number']); 
     $student_number = strip_tags($student_number); 
     $student_number = htmlspecialchars($student_number); 

     $pass = trim($_POST['pass']); 
     $pass = strip_tags($pass); 
     $pass = htmlspecialchars($pass); 
     // prevent sql injections/clear user invalid inputs 

     if(empty($student_number)){ 
      $error = true; 
      $student_number_Error = "Please enter your student number."; 
     } 

     if(empty($pass)){ 
      $error = true; 
      $passError = "Please enter your password."; 
     } 

     // if there's no error, continue to login 
     if (!$error) { 
      $password = hash('sha256', $pass); // password hashing using SHA256 

      $res=mysql_query("SELECT student_number, userPass, user_role, firstname, middlename, lastname, course FROM users WHERE student_number = '$student_number'"); 
      $row=mysql_fetch_array($res); 
      $count = mysql_num_rows($res); // if uname/pass correct it returns must be 1 row 

      if($count == 1 && $row['userPass']==$password) { 
       $_SESSION['user'] = $row['student_number']; 
       header("Location: home.php"); 
       echo $_GET['id']; 
      } else { 
       $errMSG = "Incorrect Credentials, Try again..."; 
      } 

     } 

    } 
?> 
<!DOCTYPE html> 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<title>Coding Cage - Login & Registration System</title> 
<link rel="stylesheet" href="assets/css/bootstrap.min.css" type="text/css" /> 
<link rel="stylesheet" href="style.css" type="text/css" /> 
</head> 
<body> 

<div class="container"> 

    <div id="login-form"> 
    <form method="post" action="<?php echo htmlspecialchars($_SERVER['PHP_SELF']); ?>" autocomplete="off"> 

     <div class="col-md-12"> 

      <div class="form-group"> 
       <h2 class="">Sign In.</h2> 
      </div> 

      <div class="form-group"> 
       <hr /> 
      </div> 

      <?php 
      if (isset($errMSG)) { 

       ?> 
       <div class="form-group"> 
       <div class="alert alert-danger"> 
       <span class="glyphicon glyphicon-info-sign"></span> <?php echo $errMSG; ?> 
       </div> 
       </div> 
       <?php 
      } 
      ?> 

      <div class="form-group"> 
       <div class="input-group"> 
       <span class="input-group-addon"><span class="glyphicon glyphicon-user"></span></span> 
       <input type="text" name="student_number" class="form-control" placeholder="Student Number" value="<?php echo $student_number; function a(){$student_number=$idc;}?>" maxlength="15" /> 

       </div> 

       <span class="text-danger"><?php echo $student_number_Error; ?></span> 
      </div> 

      <div class="form-group"> 
       <div class="input-group"> 
       <span class="input-group-addon"><span class="glyphicon glyphicon-lock"></span></span> 
       <input type="password" name="pass" class="form-control" placeholder="Password" maxlength="30" /> 
       </div> 
       <span class="text-danger"><?php echo $passError; ?></span> 
      </div> 

      <div class="form-group"> 
       <hr /> 
      </div> 

      <div class="form-group"> 
       <button type="submit" class="btn btn-block btn-primary" name="btn-login">Sign In</button> 
      </div> 

      <div class="form-group"> 
       <hr /> 
      </div> 

      <div class="form-group"> 
       <a href="register.php">Sign Up Here...</a> 
      </div> 

     </div> 

    </form> 
    </div> 

</div> 

</body> 
</html> 
<?php ob_end_flush(); ?>

was soll ich tun? Die Website ist bereits online.

Quelle

2017-10-23 Noel Ching