Source of file Util.php

<?php declare(strict_types=1);

/**

 * Query

 *

 * SQL Query Builder / Database Abstraction Layer

 *

 * PHP version 7.1

 *

 * @package     Query

 * @author      Timothy J. Warren <tim@timshomepage.net>

 * @copyright   2012 - 2018 Timothy J. Warren

 * @license     http://www.opensource.org/licenses/mit-license.html  MIT License

 * @link        https://git.timshomepage.net/aviat4ion/Query

 */

namespace Query\Drivers\Pgsql;

use Query\Drivers\AbstractUtil;

/**

 * Postgres-specific backup, import and creation methods

 */

class Util extends AbstractUtil {

	/**

	 * Create an SQL backup file for the current database's structure

	 *

	 * @return string

	 */

	public function backupStructure(): string

	{

		// @TODO Implement Backup function

		return '';

	}

	/**

	 * Create an SQL backup file for the current database's data

	 *

	 * @param array $exclude

	 * @return string

	 */

	public function backupData(array $exclude=[]): string

	{

		$tables = $this->getDriver()->getTables();

		// Filter out the tables you don't want

		if( ! empty($exclude))

		{

			$tables = array_diff($tables, $exclude);

		}

		$outputSql = '';

		// Get the data for each object

		foreach($tables as $t)

		{

			$sql = 'SELECT * FROM "'.trim($t).'"';

			$res = $this->getDriver()->query($sql);

			$objRes = $res->fetchAll(\PDO::FETCH_ASSOC);

			// Don't add to the file if the table is empty

			if (count($objRes) < 1)

			{

				continue;

			}

			$res = NULL;

			// Nab the column names by getting the keys of the first row

			$columns = @array_keys($objRes[0]);

			$insertRows = [];

			// Create the insert statements

			foreach($objRes as $row)

			{

				$row = array_values($row);

				// Quote values as needed by type

				$row = array_map([$this->getDriver(), 'quote'], $row);

				$row = array_map('trim', $row);

				$rowString = 'INSERT INTO "'.trim($t).'" ("'.implode('","', $columns).'") VALUES ('.implode(',', $row).');';

				$row = NULL;

				$insertRows[] = $rowString;

			}

			$objRes = NULL;

			$outputSql .= "\n\n".implode("\n", $insertRows)."\n";

		}

		return $outputSql;

	}

}