apart from the typo in the passowrd you should enable exceptions for PDO and use a try and catch statement to catch the exception. Also some other little changes, like structuring the PHP first and removing the odd re-assign of the POST superglobal.
<?php
if ($_SERVER['REQUEST_METHOD'] == 'POST'){
$result = "Thanks for registering with us!";
try{
$db = new PDO('mysql:host=localhost;dbname=phpproject', 'root', 'pdt1848!');
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
$db->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE,PDO::FETCH_ASSOC);
$sql = "INSERT INTO users (username, password, fname, lname, email)
VALUES(:username, :password, :fname, :lname, :email)";
$query = $db->prepare($sql);
$query->execute(array(':username'=>$_POST['username'],
':password'=>$_POST['password'],
':fname'=>$_POST['fname'],
':lname'=>$_POST['lname'],
':email'=>$_POST['email']));
}catch(PDOException $e){
$result = 'Sorry, an error occurred while editing the database. Contact the guy who built this garbage.';
//or use $e->getMessage(); for the real error
}
echo $result;
}
else{ ?>
<form name="registration" action="register.php" method="POST">
<label for "username">Username: </label>
<input type="text" name="username"/><br />
<label for "password">Password: </label>
<input type="password" name="password"/><br />
<label for "fname">First Name: </label>
<input type="text" name="fname"/><br />
<label for "lname">Last name: </label>
<input type="text" name="lname"/><br />
<label for "email">Email: </label>
<input type="text" name="email"/><br />
<button type="submit">Submit</button>
</form>
<?php } ?>
Also its a very bad idea to store plain-text passwords in your db. ~ Read: Best way to store password in database.
Edit,
Added some validation of your inputs to help you get started, hope it helps. not tested.
<?php
try{
$db = new PDO('mysql:host=localhost;dbname=phpproject', 'root', 'pdt1848!');
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
$db->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE,PDO::FETCH_ASSOC);
}catch(PDOException $e){
die('Sorry, an error occurred while editing the database. Contact the guy who built this garbage.');
//or use $e->getMessage(); for the real error
}
if ($_SERVER['REQUEST_METHOD'] == 'POST'){
//create empty error array - to fill with errors if any
$error = array();
//validate username
if(empty($_POST['username'])){
$error['username'] = 'Enter a username';
}elseif(strlen($_POST['username']) <= 2){
$error['username'] = 'Username too short > 2 chars';
}else{
//check for existing user
$sql = "SELECT 1
FROM `users`
WHERE username = :username";
$query = $db->prepare($sql);
$query->execute(array(':username' => $_POST['username']));
$result = $query->fetchAll(PDO::FETCH_ASSOC);
if(!empty($result)){
$error['username'] = 'User already exists';
}
}
//validate pass
if(empty($_POST['password'])){
$error['password'] = 'Please enter password';
}elseif(strlen($_POST['password']) < 6){
$error['password'] = 'Password too short, password should be 6 chars or longer';
}
//validate fname
if(empty($_POST['fname'])){
$error['fname'] = 'Please enter your first name';
}
//validate fname
if(empty($_POST['lname'])){
$error['lname'] = 'Please enter your last name';
}
//validate email
if(empty($_POST['email'])){
$error['email'] = 'Please enter your email';
}else{
if(!filter_var($_POST['email'], FILTER_VALIDATE_EMAIL)){
$error['email'] = 'Please enter valid email';
}
}
//no errors detected so insert
if(empty($error)){
$sql = "INSERT INTO users (username, password, fname, lname, email)
VALUES(:username, :password, :fname, :lname, :email)";
$query = $db->prepare($sql);
$query->execute(array(':username'=>$_POST['username'],
':password'=>$_POST['password'],
':fname'=>$_POST['fname'],
':lname'=>$_POST['lname'],
':email'=>$_POST['email']));
$result = 'Thanks for registering with us! <a href="login.php">Click here to login</a>';
}else{
$result = 'Please correct the errors';
}
}?>
<?php echo isset($result) ? $result : null;?>
<form name="registration" action="register.php" method="POST">
<label for "username">Username: <?php echo isset($error['username']) ? $error['username'] : null;?></label>
<input type="text" name="username"/><br />
<label for "password">Password: <?php echo isset($error['password']) ? $error['password'] : null;?></label>
<input type="password" name="password"/><br />
<label for "fname">First Name: <?php echo isset($error['fname']) ? $error['fname'] : null;?></label>
<input type="text" name="fname"/><br />
<label for "lname">Last name: <?php echo isset($error['lname']) ? $error['lname'] : null;?></label>
<input type="text" name="lname"/><br />
<label for "email">Email: <?php echo isset($error['email']) ? $error['email'] : null;?></label>
<input type="text" name="email"/><br />
<button type="submit">Submit</button>
</form>
