PHP社群媒體應用程式的資料備份與復原功能解析

<?php
// 连接数据库
$conn = mysqli_connect("localhost", "username", "password", "database");

// 查询需要备份的数据
$query = "SELECT * FROM users";
$result = mysqli_query($conn, $query);

// 创建备份文件
$backup_file = "backup_" . date("Y-m-d_H-i-s") . ".sql";
$handle = fopen($backup_file, 'w');

// 将查询结果写入备份文件
while ($row = mysqli_fetch_assoc($result)) {
    $line = implode(",", $row) . "
";
    fwrite($handle, $line);
}

// 关闭文件句柄和数据库连接
fclose($handle);
mysqli_close($conn);

echo "数据备份成功！";
?>

<?php
// 连接数据库
$conn = mysqli_connect("localhost", "username", "password", "database");

// 备份文件路径
$backup_file = "backup_2022-01-01_10-30-00.sql";

// 打开备份文件
$handle = fopen($backup_file, 'r');

// 逐行读取备份文件并导入到数据库
while (($line = fgets($handle)) !== false) {
    $data = explode(",", $line);
    $insert_query = "INSERT INTO users (username, email) VALUES ('" . $data[0] . "', '" . $data[1] . "')";
    mysqli_query($conn, $insert_query);
}

// 关闭文件句柄和数据库连接
fclose($handle);
mysqli_close($conn);

echo "数据恢复成功！";
?>