<form action="userAccount.php" class="login" id="login" method="post">
    <p>
        <label class="label" for="login">Student ID:</label>
        <input type="text" name="student_id" id="login" placeholder="e.g. 1510000000" required="">
    </p>

    <p>
        <label class="label" for="password">Mobile Number:</label>
        <input type="password" class="form-control pwd" name="phone" id="password" placeholder="e.g. 01700000000" required=""><span toggle="#password-field" class="fa fa-fw fa-eye field_icon toggle-password"></span>
    </p>
    <input type="submit" class="login-button" name="loginSubmit" value="Login">
</form>

<?php
session_start();
$sessData = !empty($_SESSION['sessData'])?$_SESSION['sessData']:'';
if(!empty($sessData['status']['msg'])){
    $statusMsg = $sessData['status']['msg'];
    $statusMsgType = $sessData['status']['type'];
    unset($_SESSION['sessData']['status']);
}
?>
<div class="container">
    <h2>১৯ এর ডায়েরিতে নাম লিখান</h2>
    <?php echo !empty($statusMsg)?'<p class="'.$statusMsgType.'">'.$statusMsg.'</p>':''; ?>
    <div class="regisFrm">
        <form action="userAccount.php" method="post">
           <input type="text" name="student_id" placeholder="STUDENT ID" required="">
            <input type="text" name="name" placeholder="NAME" required="">
            <input type="text" name="phone" placeholder="PHONE NUMBER" required="">
            <input type="email" name="email" placeholder="EMAIL" required="">
            <input type="text" name="blood" placeholder="BLOOD GROUP" required="">
            <input type="text" name="address" placeholder="PERMANENT ADDRESS" required="">
            <input type="password" name="password" placeholder="PASSWORD" required="">
            <input type="password" name="confirm_password" placeholder="CONFIRM PASSWORD" required="">
            <div class="send-button">
                <input type="submit" name="signupSubmit" value="ডায়েরিতে জমা দিন">
            </div>
        </form>
    </div>
</div>

<?php
//start session
session_start();
//load and initialize user class
include 'user.php';
$user = new User();
if(isset($_POST['signupSubmit'])){
    //check whether user details are empty
    if(!empty($_POST['name']) && !empty($_POST['student_id']) && !empty($_POST['phone']) && !empty($_POST['email']) && !empty($_POST['blood']) && !empty($_POST['address']) && !empty($_POST['password']) && !empty($_POST['confirm_password'])){
        //password and confirm password comparison
        if($_POST['password'] !== $_POST['confirm_password']){
            $sessData['status']['type'] = 'error';
            $sessData['status']['msg'] = 'দুইটি বক্সের পাসওয়ার্ড একই হতে হবে।';
        }else{
            //check whether user exists in the database
            $prevCon['where'] = array('email'=>$_POST['email']);
            $prevCon['return_type'] = 'count';
            $prevUser = $user->getRows($prevCon);
            if($prevUser > 0){
                $sessData['status']['type'] = 'error';
                $sessData['status']['msg'] = 'অন্য কোন ই-মেইল দিয়ে চেষ্টা করতে হবে।';
            }else{
                //insert user data in the database
                $userData = array(
                    'name' => $_POST['name'],
                    'student_id' => $_POST['student_id'],
                    'phone' => $_POST['phone'],
                    'email' => $_POST['email'],
                     'blood' => $_POST['blood'],
                    'address' => $_POST['address'],
                    'password' => md5($_POST['password']),

                );
                $insert = $user->insert($userData);
                //set status based on data insert
                if($insert){
                    $sessData['status']['type'] = 'success';
                    $sessData['status']['msg'] = 'সফলভাবে ১৯ এর সাথে সংযুক্ত হয়েছে, তথ্যাবলি খোঁজ করতে লগইন করতে হবে। ';
                }else{
                    $sessData['status']['type'] = 'error';
                    $sessData['status']['msg'] = 'কিছু সমস্যা হচ্ছে, পুনরায় চেষ্টা করতে হবে।';
                }
            }
        }
    }else{
        $sessData['status']['type'] = 'error';
        $sessData['status']['msg'] = 'অবশ্যই সবগুলি তথ্য দিতে হবে।';
    }
    //store signup status into the session
    $_SESSION['sessData'] = $sessData;
    $redirectURL = ($sessData['status']['type'] == 'success')?'index.php':'registration.php';
    //redirect to the home/registration page
    header("Location:".$redirectURL);
}elseif(isset($_POST['loginSubmit'])){
    //check whether login details are empty
    if(!empty($_POST['student_id']) && !empty($_POST['phone'])){
         //get user data from user class
        $conditions['where'] = array(
            'student_id' => $_POST['student_id'],
             'phone' => $_POST['phone'],

            'status' => '1'
        );
        $conditions['return_type'] = 'single';
        $userData = $user->getRows($conditions);
        //set user data and status based on login credentials
        if($userData){
            $sessData['userLoggedIn'] = TRUE;
            $sessData['userID'] = $userData['id'];
            $sessData['status']['type'] = 'success';
            $sessData['status']['msg'] = 'Login Successfully Mr'.$userData['name'].'!';
        }else{
            $sessData['status']['type'] = 'error';
            $sessData['status']['msg'] = 'ভুল Student ID অথবা Mobile Number, আবার চেষ্টা করতে হবে।';
        }
    }else{
        $sessData['status']['type'] = 'error';
        $sessData['status']['msg'] = ' Student ID অথবা Mobile Number যথাযথভাবে দিতে হবে।';
    }
    //store login status into the session
    $_SESSION['sessData'] = $sessData;
    //redirect to the home page
    header("Location:index.php");
}elseif(!empty($_REQUEST['logoutSubmit'])){
    //remove session data
    unset($_SESSION['sessData']);
    session_destroy();
    //store logout status into the ession
    $sessData['status']['type'] = 'success';
    $sessData['status']['msg'] = 'Logout Successfully';
    $_SESSION['sessData'] = $sessData;
    //redirect to the home page
    header("Location:index.php");
}else{
    //redirect to the home page
    header("Location:index.php");
}

<?php
session_start();
$sessData = !empty($_SESSION['sessData']) ? $_SESSION['sessData'] : '';
if (!empty($sessData['status']['msg']))
    {
    $statusMsg = $sessData['status']['msg'];
    $statusMsgType = $sessData['status']['type'];
    unset($_SESSION['sessData']['status']);
    }
?>
<html>
<?php include 'meta.php'; ?>
<body onkeydown='if ((arguments[0] || window.event).ctrlKey) return false' oncontextmenu='return false;'>
<?php
       if (!empty($sessData['userLoggedIn']) && !empty($sessData['userID']))
    {
        include 'user.php';
    $user = new User();
    $conditions['where'] = array('id' => $sessData['userID'],);
    $conditions['return_type'] = 'single';
    $userData = $user->getRows($conditions);
?>
<div class="head"> <?php include 'header.php'; ?>
      <div class="dropdown">
           <div class="pro"><img onclick="myFunction()" class="dropbtn" src="<?php echo $userData['photo']; ?>" ></div>
           <div id="myDropdown" class="dropdown-content">
                <p><b>নাম<br> </b><?php echo $userData['name_bangla']; ?></p>
                <p><b>Student ID:<br> </b><?php echo $userData['student_id']; ?></p>
                <p><b>Email:<br> </b><?php echo $userData['email']; ?></p>
                <p><b>Phone: <br></b><?php echo $userData['phone']; ?></p>
                <p><b>Blood: <br></b><?php echo $userData['blood']; ?></p>
                <p><b>District: <br></b><?php echo $userData['district']; ?></p>
                <a href="userAccount.php?logoutSubmit=1" class="logout"> Logout</a>
           </div>
     </div><div style="clear: both;"></div>
</div>
<div class="regisFrm-2"><?php include 'searchf.php'; ?></div> <?php include 'search.php';?> <?php } else { ?>
<div class="container"><?php echo !empty($statusMsg) ? '<p class="' . $statusMsgType . '">' . $statusMsg . '</p>' : ''; ?>
     <div class="regisFrm">
          <h2 style="text-align:center" class="header-2">১৯ এর ডায়েরি</h2><?php include 'login.php'; ?>
     </div><?php } ?>
</div>
   <button onclick="topFunction()" id="myBtn" title="Go to top"><i class="icon-chevron-up"></i></button>
</body>
</html>

<?php

class User{
    private $dbHost     = "localhost";
    private $dbUsername = "1093913";
    private $dbPassword = "tanim1996";
    private $dbName     = "1093913";
    private $userTbl    = "iconic19";

    public function __construct(){
        if(!isset($this->db)){
            // Connect to the database
            $conn = new mysqli($this->dbHost, $this->dbUsername, $this->dbPassword, $this->dbName);
            if($conn->connect_error){
                die("Failed to connect with MySQL: " . $conn->connect_error);
            }else{
                $this->db = $conn;
            }
        }
    }

    /*
     * Returns rows from the database based on the conditions
     * @param string name of the table
     * @param array select, where, order_by, limit and return_type conditions
     */
    public function getRows($conditions = array()){
        $sql = 'SELECT ';
        $sql .= array_key_exists("select",$conditions)?$conditions['select']:'*';
        $sql .= ' FROM '.$this->userTbl;
        if(array_key_exists("where",$conditions)){
            $sql .= ' WHERE ';
            $i = 0;
            foreach($conditions['where'] as $key => $value){
                $pre = ($i > 0)?' AND ':'';
                $sql .= $pre.$key." = '".$value."'";
                $i++;
            }
        }

        if(array_key_exists("order_by",$conditions)){
            $sql .= ' ORDER BY '.$conditions['order_by'];
        }

        if(array_key_exists("start",$conditions) && array_key_exists("limit",$conditions)){
            $sql .= ' LIMIT '.$conditions['start'].','.$conditions['limit'];
        }elseif(!array_key_exists("start",$conditions) && array_key_exists("limit",$conditions)){
            $sql .= ' LIMIT '.$conditions['limit'];
        }

        $result = $this->db->query($sql);

        if(array_key_exists("return_type",$conditions) && $conditions['return_type'] != 'all'){
            switch($conditions['return_type']){
                case 'count':
                    $data = $result->num_rows;
                    break;
                case 'single':
                    $data = $result->fetch_assoc();
                    break;
                default:
                    $data = '';
            }
        }else{
            if($result->num_rows > 0){
                while($row = $result->fetch_assoc()){
                    $data[] = $row;
                }
            }
        }
        return !empty($data)?$data:false;
    }

    /*
     * Insert data into the database
     * @param string name of the table
     * @param array the data for inserting into the table
     */
    public function insert($data){
        if(!empty($data) && is_array($data)){
            $columns = '';
            $values  = '';
            $i = 0;
            if(!array_key_exists('created',$data)){
                $data['created'] = date("Y-m-d H:i:s");
            }
            if(!array_key_exists('modified',$data)){
                $data['modified'] = date("Y-m-d H:i:s");
            }
            foreach($data as $key=>$val){
                $pre = ($i > 0)?', ':'';
                $columns .= $pre.$key;
                $values  .= $pre."'".$val."'";
                $i++;
            }
            $query = "INSERT INTO ".$this->userTbl." (".$columns.") VALUES (".$values.")";
            $insert = $this->db->query($query);
            return $insert?$this->db->insert_id:false;
        }else{
            return false;
        }
    }
}