. */ use Phinx\Migration\AbstractMigration; class DatasetAddCustomHeadersColumnMigration extends AbstractMigration { /** @inheritdoc */ public function change() { $dataSetTable = $this->table('dataset'); if (!$dataSetTable->hasColumn('customHeaders')) { $dataSetTable ->addColumn('customHeaders', 'text', ['null' => true, 'default' => null, 'after' => 'password']) ->save(); } } }