PHPでスケジュールされたデータバックアップ機能を実装する方法

<?php
// 备份目录
$backupDir = __DIR__ . '/backup/';

// 数据库连接信息
$host = 'localhost';
$username = 'root';
$password = 'password';
$dbName = 'database';
$mysqli = new mysqli($host, $username, $password, $dbName);
if ($mysqli->connect_errno) {
    die('连接数据库失败：' . $mysqli->connect_error);
}

// 备份文件名
$backupFile = $backupDir . 'backup_' . date('YmdHis') . '.sql';

// 执行备份操作
if ($mysqli->query("SHOW TABLES")) {
    $tables = [];
    $result = $mysqli->query("SHOW TABLES");
    while ($row = $result->fetch_row()) {
        $tables[] = $row[0];
    }

    $content = '';
    foreach ($tables as $table) {
        $result = $mysqli->query("SELECT * FROM $table");
        $content .= "DROP TABLE IF EXISTS $table;
";
        $row2 = $mysqli->query("SHOW CREATE TABLE $table")->fetch_row();
        $content .= $row2[1] . ";
";
        while ($row = $result->fetch_assoc()) {
            $content .= "INSERT INTO $table VALUES(";
            foreach ($row as $val) {
                $content .= "'". addslashes($val). "',";
            }
            $content = rtrim($content, ',');
            $content .= ");
";
        }
        $content .= "

";
    }

    file_put_contents($backupFile, $content);
    echo "数据备份成功：$backupFile";
} else {
    echo '获取数据表失败：' . $mysqli->error;
}

// 关闭数据库连接
$mysqli->close();

0 1 * * * php /path/to/backup.php