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- <?php
- // Include config file
- require_once 'config.php';
- // Define variables and initialize with empty values
- $username = $password = $confirm_password = "";
- $username_err = $password_err = $confirm_password_err = "";
- // Processing form data when form is submitted
- if($_SERVER["REQUEST_METHOD"] == "POST"){
- // Validate username
- if(empty(trim($_POST["username"]))){
- $username_err = "Please enter a username.";
- } else{
- // Prepare a select statement
- $sql = "SELECT id FROM users WHERE username = ?";
- if($stmt = mysqli_prepare($link, $sql)){
- // Bind variables to the prepared statement as parameters
- mysqli_stmt_bind_param($stmt, "s", $param_username);
- // Set parameters
- $param_username = trim($_POST["username"]);
- // Attempt to execute the prepared statement
- if(mysqli_stmt_execute($stmt)){
- /* store result */
- mysqli_stmt_store_result($stmt);
- if(mysqli_stmt_num_rows($stmt) == 1){
- $username_err = "This username is already taken.";
- } else{
- $username = trim($_POST["username"]);
- }
- } else{
- echo "Oops! Something went wrong. Please try again later.";
- }
- }
- // Close statement
- mysqli_stmt_close($stmt);
- }
- // Validate password
- if(empty(trim($_POST['password']))){
- $password_err = "Please enter a password.";
- } elseif(strlen(trim($_POST['password'])) < 6){
- $password_err = "Password must have atleast 6 characters.";
- } else{
- $password = trim($_POST['password']);
- }
- // Validate confirm password
- if(empty(trim($_POST["confirm_password"]))){
- $confirm_password_err = 'Please confirm password.';
- } else{
- $confirm_password = trim($_POST['confirm_password']);
- if($password != $confirm_password){
- $confirm_password_err = 'Password did not match.';
- }
- }
- // Check input errors before inserting in database
- if(empty($username_err) && empty($password_err) && empty($confirm_password_err)){
- // Prepare an insert statement
- $sql = "INSERT INTO users (username, password) VALUES (?, ?)";
- if($stmt = mysqli_prepare($link, $sql)){
- // Bind variables to the prepared statement as parameters
- mysqli_stmt_bind_param($stmt, "ss", $param_username, $param_password);
- // Set parameters
- $param_username = $username;
- $param_password = password_hash($password, PASSWORD_DEFAULT); // Creates a password hash
- // Attempt to execute the prepared statement
- if(mysqli_stmt_execute($stmt)){
- // Redirect to login page
- header("location: login.php");
- } else{
- echo "Something went wrong. Please try again later.";
- }
- }
- // Close statement
- mysqli_stmt_close($stmt);
- }
- // Close connection
- mysqli_close($link);
- }
- ?>
- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <title>Sign Up</title>
- <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.css">
- <style type="text/css">
- body{ font: 14px sans-serif; }
- .wrapper{ width: 350px; padding: 20px; }
- </style>
- </head>
- <body>
- <div class="wrapper">
- <h2>Sign Up</h2>
- <p>Please fill this form to create an account.</p>
- <form action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>" method="post">
- <div class="form-group <?php echo (!empty($username_err)) ? 'has-error' : ''; ?>">
- <label>Username</label>
- <input type="text" name="username"class="form-control" value="<?php echo $username; ?>">
- <span class="help-block"><?php echo $username_err; ?></span>
- </div>
- <div class="form-group <?php echo (!empty($password_err)) ? 'has-error' : ''; ?>">
- <label>Password</label>
- <input type="password" name="password" class="form-control" value="<?php echo $password; ?>">
- <span class="help-block"><?php echo $password_err; ?></span>
- </div>
- <div class="form-group <?php echo (!empty($confirm_password_err)) ? 'has-error' : ''; ?>">
- <label>Confirm Password</label>
- <input type="password" name="confirm_password" class="form-control" value="<?php echo $confirm_password; ?>">
- <span class="help-block"><?php echo $confirm_password_err; ?></span>
- </div>
- <div class="form-group">
- <input type="submit" class="btn btn-primary" value="Submit">
- <input type="reset" class="btn btn-default" value="Reset">
- </div>
- <p>Already have an account? <a href="login.php">Login here</a>.</p>
- </form>
- </div>
- </body>
- </html>
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