Doctrine multiple insert

MultipleInsert.php

<?php
declare(strict_types=1);

use Doctrine\DBAL\Connection;

class MultipleInsert {

	/** @var Connection */
	private $connection;

	/** @var array */
	private $inserts = [];

	/** @var array */
	private $values = [];

	/** @var array */
	private $types = [];

	public function __construct(Connection $connection) {
		$this->connection = $connection;
	}

	public function addInsert(string $tableName, array $data, array $types = []) {
		if (empty($data)) {
			$this->inserts[$tableName][] = [];
		}

		$this->inserts[$tableName][] = [
			implode(', ', array_keys($data)),
			implode(', ', array_fill(0, count($data), '?'))
		];

		foreach ($data as $key => $value) {
			$this->values[] = $value;
			$this->types[] = isset($types[$key]) ? $types[$key] : \PDO::PARAM_STR;
		}
	}

	public function execute() {
		$sql = '';
		foreach ($this->inserts as $tableName => $records) {
			foreach ($records as $array) {
				if (!$array) {
					$sql .= "INSERT INTO {$tableName} () VALUES();\n";
				} else {
					$sql .= "INSERT INTO {$tableName} ({$array[0]}) VALUES ({$array[1]});\n";
				}
			}
		}
		
		$this->connection->executeUpdate($sql, $this->values, $this->types);

		$this->inserts = [];
		$this->values = [];
		$this->types = [];
	}

}