View file app/database/migrations/20161216115222_create_ban_table.php

<?php

use Phinx\Migration\AbstractMigration;

class CreateBanTable extends AbstractMigration
{
    /**
     * Migrate Change.
     */
    public function change()
    {
        $table = $this->table('ban', ['collation' => 'utf8mb4_unicode_ci']);
        $table->addColumn('ip', 'string', ['limit' => 15])
            ->addColumn('user', 'string', ['limit' => 20, 'null' => true])
            ->addColumn('time', 'integer')
            ->addIndex('ip', ['unique' => true])
            ->create();
    }
}