Table\TablePrefixTrait.php

<?php
namespace App\Model\Table;

use Cake\Core\Configure;

/**
 * Database Prefix Trait for CakePHP 3.0
 *
 * @author Florian Krämer
 * @license MIT
 */
trait TablePrefixTrait {

	/**
	 * The table prefix to use.
	 *
	 * @var string
	 */
	protected $_tablePrefix = '';

	/**
	 * Getter and setter for the DB prefix
	 *
	 * @param string $prefix
	 * @return string
	 */
	public function dbPrefix($prefix = '') {
		if (empty($prefix)) {
			$connectionConfig = $this->connection()->config();
			if (isset($connectionConfig['prefix'])) {
				$prefix = $connectionConfig['prefix'];
			}
		}
		if (!empty($prefix)) {
			$this->_tablePrefix = $prefix;
		}
		return $this->_tablePrefix;
	}

	/**
	 * Returns the database table name or sets a new one
	 *
	 * @param string|null $table the new table name
	 * @return string
	 */
	public function table($table = null) {
		if (!empty($table)) {
			$table = $this->_tablePrefix . $table;
		}
		return parent::table($table);
	}
}