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signup.php
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<?php
session_start();
if(isset($_SESSION["id"])) {
header("location: http://localhost/real-time-chat-application/");
exit;
}
require_once 'inc/db_connection.php';
$name = $email = $emailError = $passwordError = $successful_msg = "" ;
if($_SERVER["REQUEST_METHOD"] == "POST" && isset($_POST["signup"])) {
$name = $conn -> real_escape_string($_POST["name"]);
$email = $conn -> real_escape_string($_POST["email"]);
$password = $conn -> real_escape_string($_POST["password"]);
$confirmPassword = $conn -> real_escape_string($_POST["confirmPassword"]);
$sql = "SELECT email FROM user_info WHERE email='".$email."'";
$result = $conn -> query($sql);
if(!preg_match("/^[A-Za-z0-9]+$/", $password))
$passwordError = "Password must contain at least one alphabet or number.";
elseif($password != $confirmPassword)
$passwordError = "Passwords do not match";
elseif($result -> num_rows > 0)
$emailError = "An account with this email address already exists.";
else {
$password_hash = password_hash($password, PASSWORD_DEFAULT);
$sql = "INSERT INTO user_info (name, email, password) VALUES ('$name', '$email', '$password_hash')";
if($conn -> query($sql) == TRUE) {
$name = $email = "";
$successful_msg = '<div id="successful_msg"><i class="fa-solid fa-circle-check"></i> <b>Congratulations!</b> Your account has been successfully created. Please <a href="login">login</a> to continue...</div>';
header("refresh: 5; url= login");
}
else
echo "Error: " . $conn -> error;
}
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Sign Up - UniChat</title>
<link rel="shortcut icon" type="image/x-icon" href="assets/img/favicon 1.png">
<link rel="stylesheet" type="text/css" href="assets/css/all.min.css">
<link rel="stylesheet" type="text/css" href="assets/css/fontawesome.min.css">
<link rel="stylesheet" type="text/css" href="assets/css/signup-login.css">
</head>
<body>
<?php echo $successful_msg; ?>
<div id="form_container">
<div id="form_wrapper">
<span id="logo">UniChat</span>
<span id="title">Sign Up</span>
<form action="signup" method="post">
<input type="text" name="name" placeholder="Name" value="<?php echo $name;?>" required> <br>
<input type="email" name="email" placeholder="E-mail address" value="<?php echo $email;?>" required>
<span class="error"><?php echo $emailError ?></span><br>
<input type="password" name="password" placeholder="Password" required> <br>
<input type="password" name="confirmPassword" placeholder="Confirm Password" required>
<span class="error"><?php echo $passwordError ?></span><br>
<input type="Submit" name="signup" value="Sign Up">
</form>
<p>Already have an account? <a href="login">Log in</a> </p>
</div>
</div>
</body>
</html>