register.php

make a simple user registration form where user enter their details like name, email, mobile no etc. i am using method post.

code for register.php

<form action ="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>"; method="POST">

<div class="form_div">
<div class="header_register">
<p>SignUP</p>
<?php include_once('action_register.php'); ?>
<hr>
<p style="text-decoration: none;font-size: 20px;">Already Member
<a href="login.php" style="text-decoration: none;font-size: 20px; 
color: white;"> <u>SIGN IN</u></a></p> 
</div>
	<label for="name">Name</label>
	<input  type="text" class="" name="name" placeholder="Enter Your Name:">
	<hr class="hr_style">
	
<label for="email">Email</label>
	 <input type="email" name="email" placeholder="Enter Your email">
  <hr class="hr_style">
  
	 <label for="password">Password</label>
	<input type="password" name="password" placeholder="Enter password">
  <hr class="hr_style">
  
	<label for="mobile">Mobile</label>
   <input type="number" id="mobile" name="mobile" placeholder="10 digit mobile no">
   <hr class="hr_footer">
   
   <div class="header_register">
  
 <button class="submit_button" name="SIGNUP"  >SIGN UP</button>
 
</div></div> </form>

css style

<style>
input{
width: 70%;padding: 8px 10px;margin-left: 60px;box-sizing: border-box;
display: block; border: 1px solid grey;
border-radius: 6px;font-size: 15px; align-content: center;}

.form_div{
width: 28%;background-color:
 white;box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19); 
border: 2px solid #6749b6;margin-left: 450px;margin-top: 50px;	}

.form_div label{color:black;font-size: 20px;width: 30%;margin-left: 60px;}

.header_register 
{ background-color: #6749b6;color: white;text-align: center;
font-size: 30px;margin-top: 0px;padding: 10px 20px;}

.hr_style{width: 70%;border:1px solid transparent;}

.submit_button{padding: 10px 20px;background-color: #f2f2f2;border: 1px solid #f2f2f2;font-size: 20px;}
</style>
		

Create A mysql database

CREATE TABLE `user_register` (
  `id` int(200) NOT NULL,
  `name` varchar(1000) NOT NULL,
  `email` varchar(1000) NOT NULL,
  `password` longtext NOT NULL,
  `mobile` bigint(255) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

sign in form

<form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>" method="POST">

<div class="form_div">
<div class="header_register">
<p>SignUP</p>
<?php 
include_once('action_register.php');
?>	
<hr>
<p style="text-decoration: none;font-size: 20px;">Become Member<a href="register.php" style="text-decoration: none;font-size: 20px; color: white;"> <u>Register</u></a></p> 
</div>
	<label for="name">Email</label>
	 <input type="email" name="email" placeholder="Enter Your email">
  <hr class="hr_style">
	 <label for="name">Password</label>
	<input type="password" name="password" placeholder="Enter password">
  <hr class="hr_style">
   <hr class="hr_footer">
   <div class="header_register">
 <button class="submit_button" name="login"  >Login</button>
</div>   </div></form>
	

code/index.php

		<div class="form_div">
<div class="header_register">
<p>SignUP</p>
<?php 
include_once('action_register.php');
?>	
<hr>
<?php  if (isset($_SESSION['email'])) : ?>

<p style="text-decoration: none;font-size: 20px;">WELCOME <br><a  href="?logout" style="text-decoration: none;font-size: 20px; color: white;"> <u>Log Out</u></a>
<br>
<p><?php echo "Email:-".  $_SESSION['email']; ?></p></p> 

</div>   </div>
 <?php endif ?>
 <?php  if (!isset($_SESSION['email'])) : ?>
 <?php 
header('location: login.php');
?>       
 <?php endif ?>

	

action_register.php

	
<?php
session_start();
$errors = array(); 
$db = mysqli_connect('localhost', 'root', 'password', 'database name');
		$classname="errors";
			 if (isset($_POST['SIGNUP'])) {
		// receive all input values from the form
		$email = mysqli_real_escape_string($db, $_POST['email']);
		$name = mysqli_real_escape_string($db, $_POST['name']);
		$password = mysqli_real_escape_string($db, $_POST['password']);
			$mobile = mysqli_real_escape_string($db, $_POST['mobile']);

		// form validation: ensure that the form is correctly filled
		if (empty($name)) { array_push($errors, " name is required"); }
		if (empty($email)) { array_push($errors, " Email is required"); }
		if (empty($password)) { array_push($errors, " enter valid password"); }
		if (empty($mobile)) { array_push($errors, " mobile No. is required"); }
		
		if(strlen($mobile)==10){}	else
{array_push($errors, "enter 10 digit mobile");}		

$record_check = "SELECT * FROM user_register";
$result_check = $db -> query($record_check);
 	$email_check=$mobile_check="";
 if ($result_check->num_rows > 0) {
  // output data of each row
  while($row = $result_check->fetch_assoc()) {
$email_check=  $row['email'];
$mobile_check=  $row['mobile'];
$password_check=  $row['password'];				
  }
} 
 if ($email_check==$email){array_push($errors, "email already exists");}
if ($mobile_check==$mobile){array_push($errors, "mobile no. already exists");}
$password=md5($password); //encryption of password;
		// register user if there are no errors in the form
		if (count($errors) == 0) {
	$sql123 = "INSERT INTO user_register (	name,email,password,mobile ) 
			   VALUES('$name', '$email','$password','$mobile')";
if ($db->query($sql123) === TRUE) {
array_push($errors, "Thanks for submission<h4>");
$_SESSION['email'] = $email;
				$_SESSION['success'] = "You are now logged in";
				header('location: welcome.php');
} 
else { echo "Error: " . $sql123 ;}
}}

if (isset($_POST['login'])) {
		$email = mysqli_real_escape_string($db, $_POST['email']);
		$password = mysqli_real_escape_string($db, $_POST['password']);

if (empty($email)) {array_push($errors, "enter email");}
if (empty($password)) {array_push($errors, "enter password");}
$password=md5($password);
if (count($errors) == 0) {
$query = "SELECT * FROM user_register WHERE email='$email' AND password='$password'";
$results = mysqli_query($db, $query);

if (mysqli_num_rows($results) == 1) {
				$_SESSION['email'] = $email;
				$_SESSION['success'] = "You are now logged in";
				header('location: welcome.php');
			}else {array_push($errors, "Wrong username/password combination");}
			}}
			//log out
	if (isset($_GET['logout'])) {
session_destroy();
unset($_SESSION['email']);
header("location: welcome.php");
}
?>
<?php  if (count($errors) > 0) : ?>
		<?php foreach ($errors as $error) : ?>
			<h5 class="errors" style="color: red;">	<?php echo $error ?></h5>
		<?php endforeach ?>
<?php  endif ?>