php user login and registration

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Paulina
04 May 2019
1<?php
2session_start();
3
4// initializing variables
5$username = "";
6$email    = "";
7$errors = array(); 
8
9// connect to the database
10$db = mysqli_connect('localhost', 'root', '', 'registration');
11
12// REGISTER USER
13if (isset($_POST['reg_user'])) {
14  // receive all input values from the form
15  $username = mysqli_real_escape_string($db, $_POST['username']);
16  $email = mysqli_real_escape_string($db, $_POST['email']);
17  $password_1 = mysqli_real_escape_string($db, $_POST['password_1']);
18  $password_2 = mysqli_real_escape_string($db, $_POST['password_2']);
19
20  // form validation: ensure that the form is correctly filled ...
21  // by adding (array_push()) corresponding error unto $errors array
22  if (empty($username)) { array_push($errors, "Username is required"); }
23  if (empty($email)) { array_push($errors, "Email is required"); }
24  if (empty($password_1)) { array_push($errors, "Password is required"); }
25  if ($password_1 != $password_2) {
26	array_push($errors, "The two passwords do not match");
27  }
28
29  // first check the database to make sure 
30  // a user does not already exist with the same username and/or email
31  $user_check_query = "SELECT * FROM users WHERE username='$username' OR email='$email' LIMIT 1";
32  $result = mysqli_query($db, $user_check_query);
33  $user = mysqli_fetch_assoc($result);
34  
35  if ($user) { // if user exists
36    if ($user['username'] === $username) {
37      array_push($errors, "Username already exists");
38    }
39
40    if ($user['email'] === $email) {
41      array_push($errors, "email already exists");
42    }
43  }
44
45  // Finally, register user if there are no errors in the form
46  if (count($errors) == 0) {
47  	$password = md5($password_1);//encrypt the password before saving in the database
48
49  	$query = "INSERT INTO users (username, email, password) 
50  			  VALUES('$username', '$email', '$password')";
51  	mysqli_query($db, $query);
52  	$_SESSION['username'] = $username;
53  	$_SESSION['success'] = "You are now logged in";
54  	header('location: index.php');
55  }
56}
57
58// ... 
59
source
Christopher
04 May 2016
1<html>
2<head>
3<title>PHP User Registration Form</title>
4<link href="./css/style.css" rel="stylesheet" type="text/css" />
5</head>
6<body>
7    <form name="frmRegistration" method="post" action="">
8        <div class="demo-table">
9        <div class="form-head">Sign Up</div>
10            
11<?php
12if (! empty($errorMessage) && is_array($errorMessage)) {
13    ?>	
14            <div class="error-message">
15            <?php 
16            foreach($errorMessage as $message) {
17                echo $message . "<br/>";
18            }
19            ?>
20            </div>
21<?php
22}
23?>
24            <div class="field-column">
25                <label>Username</label>
26                <div>
27                    <input type="text" class="demo-input-box"
28                        name="userName"
29                        value="<?php if(isset($_POST['userName'])) echo $_POST['userName']; ?>">
30                </div>
31            </div>
32            
33            <div class="field-column">
34                <label>Password</label>
35                <div><input type="password" class="demo-input-box"
36                    name="password" value=""></div>
37            </div>
38            <div class="field-column">
39                <label>Confirm Password</label>
40                <div>
41                    <input type="password" class="demo-input-box"
42                        name="confirm_password" value="">
43                </div>
44            </div>
45            <div class="field-column">
46                <label>Display Name</label>
47                <div>
48                    <input type="text" class="demo-input-box"
49                        name="firstName"
50                        value="<?php if(isset($_POST['firstName'])) echo $_POST['firstName']; ?>">
51                </div>
52
53            </div>
54            <div class="field-column">
55                <label>Email</label>
56                <div>
57                    <input type="text" class="demo-input-box"
58                        name="userEmail"
59                        value="<?php if(isset($_POST['userEmail'])) echo $_POST['userEmail']; ?>">
60                </div>
61            </div>
62            <div class="field-column">
63                <div class="terms">
64                    <input type="checkbox" name="terms"> I accept terms
65                    and conditions
66                </div>
67                <div>
68                    <input type="submit"
69                        name="register-user" value="Register"
70                        class="btnRegister">
71                </div>
72            </div>
73        </div>
74    </form>
75</body>
76</html>
source
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