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login.php
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login.php
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<?php
// Initialize the session
// Check if the user is already logged in, if yes then redirect him to welcome page
if(isset($_SESSION["loggedin"]) && $_SESSION["loggedin"] === true){
header("location: home.php");
exit;
}
// Include config file
require_once "config/constants.php";
// Define variables and initialize with empty values
$username = $password = "";
$username_err = $password_err = $login_err = "";
// Processing form data when form is submitted
if($_SERVER["REQUEST_METHOD"] == "POST"){
// Check if username is empty
if(empty(trim($_POST["username"]))){
$username_err = "Please enter username.";
} else{
$username = trim($_POST["username"]);
}
// Check if password is empty
if(empty(trim($_POST["password"]))){
$password_err = "Please enter your password.";
} else{
$password = trim($_POST["password"]);
}
// Validate credentials
if(empty($username_err) && empty($password_err)){
// Prepare a select statement
$sql = "SELECT id, username, password FROM users WHERE username = ?";
if($stmt = mysqli_prepare($conn ,$sql)){
// Bind variables to the prepared statement as parameters
mysqli_stmt_bind_param($stmt, "s", $param_username);
// Set parameters
$param_username = $username;
// Attempt to execute the prepared statement
if(mysqli_stmt_execute($stmt)){
// Store result
mysqli_stmt_store_result($stmt);
// Check if username exists, if yes then verify password
if(mysqli_stmt_num_rows($stmt) == 1){
// Bind result variables
mysqli_stmt_bind_result($stmt, $id, $username, $hashed_password);
if(mysqli_stmt_fetch($stmt)){
if(password_verify($password, $hashed_password)){
// Password is correct, so start a new session
session_start();
// Store data in session variables
$_SESSION["loggedin"] = true;
$_SESSION["id"] = $id;
$_SESSION["username"] = $username;
// Redirect user to welcome page
header("location: index.php");
} else{
// Password is not valid, display a generic error message
$login_err = "Invalid username or password.";
}
}
} else{
// Username doesn't exist, display a generic error message
$login_err = "Invalid username or password.";
}
} else{
echo "Oops! Something went wrong. Please try again later.";
}
// Close statement
mysqli_stmt_close($stmt);
}
}
// Close connection
mysqli_close($conn);
}
?>
<style>
@import url('https://fonts.googleapis.com/css2?family=Abril+Fatface&family=Comfortaa&family=Fredoka+One&family=Modak&family=Nunito:wght@600&display=swap');
@font-face {
src: url(/fonts/GarbataTrial-Extralight.ttf);
font-family: nancy;
}
@font-face {
src: url(fonts/Borsok\ 400.otf);
font-family: logofont;
}
@font-face {
src: url(fonts/Chloe-Regular.otf);
font-family: taglinefont;
}
</style>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Login</title>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
<style>
body{ font: 14px sans-serif; }
.wrapper{ width: 360px; padding: 20px; }
</style>
</head>
<script src="https://unpkg.com/@lottiefiles/lottie-player@latest/dist/lottie-player.js"></script>
<lottie-player src="https://assets3.lottiefiles.com/packages/lf20_xlmz9xwm.json" background="black" speed="1" style="width: 300px; height: 300px; margin-left: auto; margin-right: auto;" loop autoplay></lottie-player>
<body style="background-color:black; color:white; margin-left: auto; margin-right: auto; ">
<div class="wrapper" style="background-color:black; color:white; margin-left: auto; margin-right: auto; ">
<h2 style=" font-family: logofont; color:#7ed756; letter-spacing: 0.5mm; text-align:center;">Login</h2>
<p style="font-family:taglinefont ;font-size:0.5cm;">Please 🙏Login to access the website</p>
<?php
if(!empty($login_err)){
echo '<div class="alert alert-danger">' . $login_err . '</div>';
}
?>
<form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="post" style="background-color:black; color:white; margin-left: auto; margin-right: auto; ">
<div class="form-group" style="background-color:black; color:white; margin-left: auto; margin-right: auto; ">
<label >Username</label>
<input type="text" name="username" class="form-control <?php echo (!empty($username_err)) ? 'is-invalid' : ''; ?>" value="<?php echo $username; ?>">
<span class="invalid-feedback"><?php echo $username_err; ?></span>
</div>
<div class="form-group" style="background-color:black; color:white; margin-left: auto; margin-right: auto; ">
<label >Password</label>
<input type="password" name="password" class="form-control <?php echo (!empty($password_err)) ? 'is-invalid' : ''; ?>">
<span class="invalid-feedback"><?php echo $password_err; ?></span>
</div>
<div class="form-group" style="background-color:black; color:white; margin-left: auto; margin-right: auto; ">
<input type="submit" class="btn btn-primary" value="Login">
</div>
<p>Don't have an account? <a href="register.php">Sign up now</a>.</p>
<p>Want to reset password?<a href="reset-password.php">reset</a>.</p>
<p>logout<a href="reset-password.php">Logout</a>.</p>
</form>
</div>
</body>
</html>