Repository pattern

Repository/IStorage.php

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+<?php
+
+namespace DesignPatterns\Repository;
+
+/**
+ * Interface IStorage
+ *
+ * This interface describes methods for accessing storage.
+ * Concrete realization could be whatever we want - in memory, relational database, NoSQL database and etc
+ *
+ * @package DesignPatterns\Repository
+ */
+interface IStorage
+{
+    /**
+     * Method to persist data
+     * Returns new id for just persisted data
+     *
+     * @param array() $data
+     * @return int
+     */
+    public function persist($data);
+
+    /**
+     * Returns data by specified id.
+     * If there is no such data null is returned
+     *
+     * @param int $id
+     * @return array|null
+     */
+    public function retrieve($id);
+
+    /**
+     * Delete data specified by id
+     * If there is no such data - false returns, if data has been successfully deleted - true returns
+     *
+     * @param int $id
+     * @return bool
+     */
+    public function delete($id);
+}