PHP Signup with OTP Email Verification System - Login and Logout (Part 5)

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Login to Create a Session:

In order to use an active account after the OTP verification and account activation process needs to login into the account, So in this tutorial will create a PHP login function to set a session to login into the account.

Now we will create a PHP login function with validations.

In the index.php file copy the below code and paste it above the signup code.

PHP Login Code:

• In this code, we have set cookies for remember me PHP function which will create in the next tutorial.

session_start();

if (isset($_SESSION['id'])) {
	header("Location: home.php");
}

// LOGIN PROCESS CODE
if (isset($_POST['login'])) {
	
	$email = mysqli_real_escape_string($conn, $_POST['email']);
	$password = mysqli_real_escape_string($conn, md5($_POST['password']));

	$sqlLogin = "SELECT * FROM user WHERE email ='".$email."' AND password = '".$password."' AND status = 'active'";
	$resultLogin = mysqli_query($conn, $sqlLogin);

	if (mysqli_num_rows($resultLogin) > 0) {

		$rememberme = $_POST['rememberme'];

		if ($rememberme == "checked") {
			
			setcookie('email', $email);
			setcookie('password', $password);
		}
		else{
			setcookie('email', '');
			setcookie('password', '');
		}
		
		if($rowLogin = mysqli_fetch_assoc($resultLogin)){

			$_SESSION['id'] = $rowLogin['uid'];
			$name = $rowLogin['name'];

			setcookie('username', $name);

			header("Location: home.php");
		}else{
			echo "<script>alert('Opss something wrong..');</script>";
		}
	}
	else{
		echo "<script>alert('No user exist with this email OR wrong password');</script>";
	}
}

PHP Logout Code:

• create a logout.php file and copy-paste the below code.

<?php
include "config.php";
session_start();

if (isset($_SESSION['id'])) {
	
	setcookie('username', "");

	if (session_destroy()) {
		
		header("Location: index.php");
	}
}