opensmtpdadmin/admin/backup.php

<?php
// 
// OpenSMTPD Admin 
// by Mischa Peters <mischa at high5 dot nl>
// Copyright (c) 2022 High5!
// License Info: LICENSE.TXT
//
// File: backup.php
//
// Template File: -none-
//
// Template Variables:
//
// -none-
//
// Form POST \ GET Variables:
//
// -none-
//
require_once '../functions.inc.php';
include '../languages/' . check_language() . '.lang';
date_default_timezone_set('Europe/Amsterdam');

if ($_SERVER['REQUEST_METHOD'] == "GET") {
	umask(077);
	$filename = "opensmtpadmin-" . date("Ymd") . "-" . getmypid() . ".sql";
	$backup = "/tmp" . $filename;
	$header = "#\n# OpenSMTPD Admin " . VERSION . "\n# Date: " . date("D M j G:i:s T Y") . "\n#\n";
	$tables = array('admin','alias','domain','domain_admins','log','mailbox','vacation');

	if (!$fh = fopen($backup, 'w')) {
		$message = "<div class=\"error_msg\">Cannot open file ($backup)</div>";
		include '../templates/header.tpl';
		include '../templates/admin_menu.tpl';
		include '../templates/message.tpl';
		include '../templates/footer.tpl';
	} else {
		fwrite($fh, $header);
		$dbh = connect_db();
		foreach ($tables as $table) {
			$sth = $dbh->query("SHOW CREATE TABLE $table");
			$row = $sth->fetch(PDO::FETCH_ASSOC);
			fwrite ($fh, $row['Create Table']. "\n\n");
		}

		foreach ($tables as $table) {
			$sth = $dbh->query("SELECT * FROM $table");
			while ($row = $sth->fetch(PDO::FETCH_ASSOC)) {
				foreach ($row as $k => $v) {
					$keys[] = $k;
					$values[] = $v;
				}
				fwrite($fh, "INSERT INTO ". $table . " (". implode (',',$keys) . ") VALUES ('" . implode ('\',\'',$values) . "')\n");
				$keys = array();
				$values = array();
			}
		}
	}
	header("Content-Type: application/octet-stream");
	header("Content-Disposition: attachment; filename=\"$filename\"");
	header("Content-Transfer-Encoding: binary");
	header("Content-Length: " . filesize("$backup"));
	header("Content-Description: OpenSMTPD Admin");
	$download_backup = fopen("$backup", "r");
	unlink("$backup");
	fpassthru($download_backup);
}
?>