Elgg / Elgg

engine/classes/Elgg/Database/Seeds/Seed.php

<?php

namespace Elgg\Database\Seeds;

/**
 * Abstract seed
 *
 * Plugins should extend this class to create their own seeders,
 * add use 'seeds','database' plugin hook to add their seed to the sequence.
 */
abstract class Seed implements Seedable {

	use Seeding;

	/**
	 * Seed constructor.
	 *
	 * @param null $limit Number of item to seed

Are you sure the doc-type for parameter $limit is correct as it would always require null to be passed?

	 */
	public function __construct($limit = null) {
		if (isset($limit)) {
			$this->limit = $limit;
		}
	}

	/**
	 * Populate database
	 * @return mixed
	 */
	abstract function seed();

It is generally recommended to explicitly declare the visibility for methods.

	/**
	 * Removed seeded rows from database
	 * @return mixed
	 */
	abstract function unseed();

It is generally recommended to explicitly declare the visibility for methods.

}