一般错误：1366不正确的整数值

Question

So I am working on an app until I got an error which I can't figure out why this does not work, essentially the code is trying to put something in a database, which it is not doing. I got this error with it.

Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[HY000]: General error: 1366 Incorrect integer value: '' for column 'id' at row 1' in /Users/DannyTran/Desktop/WebServer/social-network/classes/DB.php:10 Stack trace: #0 /Users/DannyTran/Desktop/WebServer/social-network/classes/DB.php(10): PDOStatement->execute(Array) #1 /users/DannyTran/Desktop/WebServer/social-network/register.php(24): DB::query('INSERT INTO use...', Array) #2 {main} thrown in /Users/DannyTran/Desktop/WebServer/social-network/classes/DB.php on line 10

Here is the code that I would have:
Database:

 CREATE TABLE `users` (
     `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
      `username` varchar(255) NOT NULL DEFAULT '',
      `first_name` varchar(255) NOT NULL DEFAULT '',
      `last_name` varchar(255) NOT NULL DEFAULT '',
      `email` varchar(255) NOT NULL DEFAULT '',
      `password` varchar(255) NOT NULL DEFAULT '',
      `gender` varchar(11) NOT NULL DEFAULT '',
      `country` varchar(255) NOT NULL DEFAULT '',
      `verified` int(11) NOT NULL,
      `role` varchar(255) NOT NULL DEFAULT '',
      `bio` text,
      `website` text,
      `status` text,
      `register` date NOT NULL,
      `last` date NOT NULL,
      `activated` int(11) DEFAULT NULL,
      PRIMARY KEY (`id`)
    ) ENGINE=InnoDB DEFAULT CHARSET=latin1;

Register.php:

    <?php
    include('./classes/DB.php');
    $pdo = new PDO('mysql:host=127.0.0.1;DBname=socialnetwork;charset=utf8', 'root', 'password');
    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

    if(isset($_POST['register'])) {
        $fn = strip_tags(@$_POST['fname']);
        $ln = strip_tags(@$_POST['lname']);
        $un = strip_tags(@$_POST['uname']);
        $em = strip_tags(@$_POST['email']);
        $pswd = strip_tags(@$_POST['password']);
        $pswd2 = strip_tags(@$_POST['password2']);
        $country = strip_tags(@$_POST['country']);
        $gender = strip_tags(@$_POST['gender']);
        $date = date("m-d-Y"); // Year - Month - Day
        $no = 0;
        $role = 'Member';
        $status = 'Hello world!';
        $website = '';  
        $bio = '';



        DB::query('INSERT INTO users VALUES (\'\' , :username, :first_name, :last_name, :email, :password, :gender, :country, :verified, :role, :bio, :website, :status, :register, :last, :activated)', array(':username'=>$un,':first_name'=>$fn, ':last_name'=>$ln, ':email'=>$em, ':password'=>$pswd, ':gender'=>$gender, ':country'=>$country, ':verified'=>0, ':role'=>$role, ':bio'=>$bio, ':website'=>$website, ':status'=>$status, ':register'=>$date, ':last'=>$date, ':activated'=>0));
        echo "Welcome!";
    };

?>




<h1>Register Now</h1>
        <form action="#" method="post">
            <input type="text" placeholder="First Name" name="fname" required/><br /><br />
            <input type="text" placeholder="Last Name" name="lname" required/><br /><br />
            <input type="text" placeholder="Username" name="uname" required/><br /><br />
            <input type="email" placeholder="E-Mail Address" name="email" required/><br /><br />
            <input type="password" placeholder="Password" name="pswd" required/><br /><br />
            <input type="password" placeholder="Confirm Password" name="pswd2" required/><br /><br />
            <select name="gender">
                <option value="" disabled selected>Gender</option>
                <option value="Male">Male</option>
                <option value="Female">Female</option>
                <option value="Other">Other</option>
            </select><br /><br />
            <?php require_once './options/countries.php'; ?><br /><br />
            <input name="register" type="submit" value="Login" /><br /><br />
        </form>
        <a href="login.php">Have an account? Login!</a>

DB.php:

<?php


class DB {
        private static function connect() {
                $pdo = new PDO('mysql:host=127.0.0.1;dbname=socialnetwork;charset=utf8', 'root', 'password');
                $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
                return $pdo;
        }
        public static function query($query, $params = array()) {
                $statement = self::connect()->prepare($query);
                $statement->execute($params);
                // $data = $statement->fetchAll();
                // return $data;
        }
    }
?>

I would appreciate any help I could get, thank you!

Answer 1

The error message tells you what's wrong; you're trying to insert a row with an id integer value ''.

That is not valid.

Either provide a valid integer as id, or fallback on the auto-increment feature by not providing an id at all. The downside there is that you have to name each column for which you do wish to provide values.

Read the MySQL documentation on INSERT to find out how to use it.