Use of undefined constant when seeding - php

Question

I get this error when trying to seed my database with php artisan db:seed:
[ErrorException] Use of undefined constant username - assumed 'username'
I've checked the Laravel docs and the syntax looks correct, however I'm not sure what I'm messing up on this.
<?php
class DatabaseSeeder extends Seeder {
/**
* Run the database seeds.
*
* #return void
*/
public function run(){
Eloquent::unguard();
$this->call('UsersTableSeeder');
}
}
class UsersTableSeeder extends Seeder {
public function run(){
User::create([
'username' => 'Ziggy',
'email' => 'ziggy#stardust.com',
'password' => '1234'
]);
}
}
EDIT: I've added the User model:
use Illuminate\Auth\UserTrait;
use Illuminate\Auth\UserInterface;
use Illuminate\Auth\Reminders\RemindableTrait;
use Illuminate\Auth\Reminders\RemindableInterface;
class User extends Eloquent implements UserInterface, RemindableInterface {
public $timestamps = false;
protected $fillable = [username, password];
use UserTrait, RemindableTrait;
/**
* The database table used by the model.
*
* #var string
*/
protected $table = 'users';
/**
* The attributes excluded from the model's JSON form.
*
* #var array
*/
protected $hidden = array('password', 'remember_token');
}
Here is the migration file used:
<?php
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;
class CreateUsersTable extends Migration {
/**
* Run the migrations.
*
* #return void
*/
public function up()
{
Schema::create('users', function(Blueprint $table)
{
$table->increments('id');
$table->string('username');
$table->string('email')->unique();
$table->string('password');
$table->timestamps();
});
}
/**
* Reverse the migrations.
*
* #return void
*/
public function down()
{
Schema::table('users', function(Blueprint $table)
{
Schema::drop('users');
});
}
}

Answer 1

In User class, change this:
protected $fillable = [username, password];
to this
protected $fillable = ['username', 'password'];
The way it has been declared, PHP took them as constants and not strings