Untitled

<!DOCTYPE HTML>
       <html>
        <head>
     <style>
      .error {
color:red;
   }

   .button {
background-color: #4CAF50;
border: none;
color: white;
padding: 10px 25px;
text-align: center;
text-decoration: none;
display: inline-block;
font-size: 16px;
margin: 4px 2px;
cursor: pointer;
  }
   .div1 {
background-color: #f2f2f2;
margin-top: -19px;
margin-bottom: -25px;
margin-left: -19px;
 }

  .copy {
border-radius: 4px;
padding: 6px 20px;
 border-style: ridge;
  }

    .copy1{
 border-radius: 4px;
 padding: 6px 28px;
 border-style: ridge;
}

     .copy2  {
    border-radius: 4px;
     padding: 4px 2px;

       }
        </style>
       </head>
         <body>

 <?php
 // define variables and set to empty values
    include_once 'connect.php';
     $nameErr = $emailErr = $usernameErr = $passwordErr = $DateOfBirthErr =
  $departmentErr = $ageErr = "";
    $name = $email = $username = $password = $DateOfBirth = $department =
    $age = "";

    if (isset($_POST['submit'])) {
    if (empty($_POST["name"])) {
     $nameErr = "Name is required";
    } else {
   $name = test_input($_POST["name"]);
    // check if name only contains letters and whitespace
    if (!preg_match("/^[a-zA-Z ]*$/",$name)) {
  $nameErr = "Only letters and white space allowed";
    }
    }

    if (empty($_POST["email"])) {
       $emailErr = "Email is required";
    } else {
      $email = test_input($_POST["email"]);
    // check if e-mail address is well-formed
       if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
     $emailErr = "Invalid email format";
        }
    }

    if (empty($_POST["username"])) {
     $usernameErr = "Username is required";
    } else {
    $username = test_input($_POST["username"]);
      // check if name only contains letters and whitespace
    if (!preg_match("/^[a-zA-Z ]*$/",$username)) {
     $usernameErr = "Only letters and white space allowed";
      }
    }

   if (empty($_POST["password"])) {
   $passwordErr = "Password is required";
     } else {
   $password = test_input($_POST["password"]);
   $hashed_password = password_hash($password, PASSWORD_DEFAULT);
       // check weather password is alphanumeric
    if(!preg_match('/^(?=.*d)(?=.*[A-Za-z])[0-9A-Za-z!@#$%]{6,}$/',
    $password))
    {
      $passwordErr = "Password must be alphanumeric and atleast 6 characters
   long!";
     }
     }

     if (empty($_POST["Date_of_birth"])) {
     $DateOfBirthErr = "Date Of Birth is required";
    } else {
   $DateOfBirth = test_input($_POST["Date_of_birth"]);
      }

   if (empty($_POST["department"])) {
   $departmentErr = "Department is required";
   } else {
     $department = test_input($_POST["department"]);
   }

 if (empty($_POST["age"])) {
   $ageErr = "Age is required";
  } else {
    $age = test_input($_POST["age"]);
    }

   if($nameErr == "" && $emailErr == "" && $usernameErr == "" &&
   $passwordErr ==
   "")
   {
 $check="SELECT * FROM users WHERE username = '$_POST[username]'";
   $rs = mysqli_query($mysqli,$check);
 $da = mysqli_fetch_array($rs, MYSQLI_NUM);
  if($da[0] > 0) {
 echo "Username Already in Exists<br/>";
 }

 else
 {
$sql = "INSERT INTO users(`id`,`username`, `password`, `email` , `name` ,
  `Date_of_birth` , `department` ,`age`)
         VALUES ('','".$username."', '".$hashed_password."', '".$email."' ,
  '".$name."' , '".$DateOfBirth."' , '".$department."' , '".$age."')";

    if (mysqli_query($mysqli, $sql)) {
    echo "Registered successfully";
    } else {
    echo "Error: " . $sql . "<br>" . mysqli_error($mysqli);
    }
    mysqli_close($mysqli);
  }
  }

 }

    function test_input($data) {
  $data = trim($data);
  $data = stripslashes($data);
  $data = htmlspecialchars($data);
return $data;
  }
 ?>


  <div style="padding-left: 250px" class="div1">
   <h2 style="color:#009999">Registration Form :</h2>
 <p><span class="error">All fields are required </span></p>
 <form method="post" action="">
 <span style="color:#0099ff">Name: </span>
<input type="text" name="name" class= "copy" style="margin-left: 52px"
value ="<?php
         if (isset($name))
          echo $name;
     ?>">
   <span class="error"> <?php echo $nameErr;?></span>
  <br><br>
  <span style="color:#0099ff"> E-mail: </span>
      <input type="text" name="email" class= "copy" style="margin-left:
   48px"  value
  ="<?php
         if (isset($email))
          echo $email;
     ?>">
     <span class="error"><?php echo $emailErr;?></span>
   <br><br>
  <span style="color:#0099ff"> Username: </span>
   <input type="text" name="username"  class= "copy" style="margin-
  left:26px"
     value ="<?php
         if (isset($username))
          echo $username;
     ?>">
   <span class="error"> <?php echo $usernameErr;?></span>
   <br><br>
   <span style="color:#0099ff"> Password: </span>
   <input type="password" name="password"  class= "copy" style="margin-
  left:30px">
  <span class="error"> <?php echo $passwordErr;?></span>
   <br><br>
   <span style="color:#0099ff"> Date Of Birth : </span>
 <input type="date" class= "copy1" name="Date_of_birth"  value ="<?php
         if (isset($DateOfBirth))
          echo $DateOfBirth;
     ?>">
 <span class="error"> <?php echo $DateOfBirthErr;?></span>
  <br><br>
  <span style="color:#0099ff">  Age : </span>
   <input type="number" name="age"  class= "copy" style="margin-left:62px"
  value
  ="<?php
         if (isset($age))
          echo $age;
     ?>">
   <span class="error"> <?php echo $ageErr;?></span>
  <br><br>
  <span style="color:#0099ff">  Department : </span>
  <select name="department"  class= "copy2" style="margin-left:14px"  value
    ="<?
  php
         if (isset($department))
          echo $department;
     ?>">
<option value="EE">Electrical & Electronics</option>
<option value="EC">Electronics & Communication</option>
<option value="ME">Mechanical</option>
<option value="CS">Computer Science</option>
<option value="CV">Civil</option>
<option value="IS">Information Science</option>
  </select>
   <span class="error"> <?php echo $departmentErr;?></span>
   <br><br>
  <input type="submit" class="button" name="submit" value="Register">
    <p style="color:black">Already Registered? <a
  href="login.php">Login</a>.
  </p>
        </form>
        </div>
   </body>
</html>

<?php

   $error="";
    include_once 'connect.php';
     if(isset($_SESSION['login_user']))
    {
      header('location:welcome.php');
      }
   session_start();

  if($_SERVER["REQUEST_METHOD"] == "POST") {
       // username and password sent from form

     $myusername = mysqli_real_escape_string($mysqli,$_POST['username']);
    $mypassword = mysqli_real_escape_string($mysqli,$_POST['password']);

   $sql = "SELECT * FROM users WHERE username = '$myusername' ";
   $result = mysqli_query($mysqli,$sql);
  $row = mysqli_fetch_array($result);
  $hashed_password=$row['password'];
   if(password_verify($mypassword, $hashed_password)) {

  $_SESSION['login_user'] = $myusername;

  header("location: welcome.php");
  exit();
  }
 else
  {
 $error = " Invalid Username or Password ";
 }
}


    ?>
 <html>

    <head>
  <title>Login Page</title>

  <style type = "text/css">
     body {
        font-family:Arial, Helvetica, sans-serif;
        font-size:14px;
     }
     label {
        font-weight:bold;
        width:100px;
        font-size:14px;
     }
     .box {
        border:#666666 solid 1px;
     }

     .button {
         background-color: #4CAF50;
        border: none;
        color: white;
        padding: 10px 20px;
        text-align: center;
        text-decoration: none;
        display: inline-block;
        font-size: 12px;
        margin: 4px 2px;
        cursor: pointer;
   }
   </style>

   </head>

     <body bgcolor = "#FFFFFF">

   <div align = "center">

        <div style = "margin:30px">

           <form action = "" method = "post">
              <label>Username : </label><input type = "text" name =
       "username" class = "box"/><br /><br />
              <label>Password : </label><input type = "password" name =
     "password" class = "box" /><br/><br />
              <input class="button" type = "submit" value = " login "/><br
     />
           </form>

           <div style = "font-size:11px; color:#cc0000; margin-top:10px"><?
        php echo $error; ?></div>

        </div>

      </div>

     </body>
     </html>

<?php

     include('session.php');
    if(!isset($_SESSION['login_user'])){
 header('location:login.php');
     }

   ?>


    <html>

    <head>
     <title>Welcome </title>
  </head>

   <body>
      <h1>Welcome <?php echo $login_session; ?></h1>
     <h2><a href = "logout.php">logOut</a></h2>

  </body>

</html>

<?php
     include_once 'connect.php';
   session_start();

     $user_check = $_SESSION['login_user'];

  $ses_sql = mysqli_query($mysqli,"select username from users where username
   =
 '$user_check' ");

   $row = mysqli_fetch_array($ses_sql,MYSQLI_ASSOC);

  $login_session = $row['username'];

     if(!isset($_SESSION['login_user'])){
      header("location:login.php");
    }


       ?>

<?php
   session_start();

   if(session_destroy()) {
  header("Location: login.php");
  }
?>

<?php


   $databaseHost = 'localhost';
  $databaseName = 'amith';
  $databaseUsername = 'root';
   $databasePassword = '';

         $mysqli = mysqli_connect($databaseHost, $databaseUsername,
    $databasePassword, $databaseName);


     ?>