How to use PHP to write a backup and recovery tool for employee attendance data?

How to use PHP to write a backup and recovery tool for employee attendance data?

With the development of technology and the advancement of office automation, many companies have begun to use electronic attendance systems to manage employee attendance data. Data backup and recovery are crucial to ensuring data security and reliability. This article will introduce how to use PHP to write a backup and recovery tool for employee attendance data, and provide specific code examples.

1. Back up attendance data

1. Create a backup folder

First, we need to create a folder to store backup data. You can create a folder named "backup" in the project root directory.

<?php
$backupPath = __DIR__ . "/backup";
if(!file_exists($backupPath)) {
    mkdir($backupPath, 0777, true);
}
?>

2. Backup database

To back up employee attendance data, we need to back up the relevant tables in the database. First, connect to the database:

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}
?>

Then, get the list of data tables to be backed up and save the data of each table as a separate SQL file:

<?php
$tables = array("table1", "table2", "table3");

foreach($tables as $table) {
    $filename = $backupPath . "/" . $table . "_" . date('Y-m-d') . ".sql";
    $sql = "SELECT * INTO OUTFILE '$filename' FROM $table";
    if ($conn->query($sql) !== TRUE) {
        echo "备份 $table 数据失败: " . $conn->error;
    }
}

$conn->close();
?>

After the backup is completed, you will Backup files are seen in the "backup" folder.

2. Restore attendance data

1. Create a recovery folder

In order to avoid data confusion, we need to create a temporary file to store the recovery data folder. You can create a folder named "restore" in the project root directory.

<?php
$restorePath = __DIR__ . "/restore";
if(!file_exists($restorePath)) {
    mkdir($restorePath, 0777, true);
}
?>

2. Restore the database

In order to restore the attendance data, we need to import the backup data file into the database. First, connect to the database:

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
    die("连接失败: " . $conn->connect_error);
}
?>

Then, get the list of backup files to be restored, and import the data in each file into the corresponding table in the database:

<?php
$files = glob($restorePath . "/*.sql");

foreach($files as $file) {
    $tablename = pathinfo($file, PATHINFO_FILENAME);
    $sql = "LOAD DATA INFILE '$file' INTO TABLE $tablename";
    if ($conn->query($sql) !== TRUE) {
        echo "恢复 $tablename 数据失败: " . $conn->error;
    }
}

$conn->close();
?>

After the restoration is completed, The database will contain the data imported from the backup file.

3. Regular backup and recovery

In order to ensure the security and integrity of data, it is recommended to perform data backup and recovery operations regularly. You can use scheduled task tools (such as cron) to set up backup and recovery scripts to be executed regularly.

For example, perform a backup operation every early morning:

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

Perform a recovery operation every Monday early morning:

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

By regularly backing up and restoring attendance data, data security can be effectively guaranteed and reliability, reducing the risk of data loss.

Summary:

This article introduces how to use PHP to write a backup and recovery tool for employee attendance data. Regular backup and recovery of attendance data can be achieved by creating backup folders, backing up database tables, and restoring database tables. Regular backup and recovery of attendance data can help ensure data security and reliability and reduce the risk of data loss.

The above are specific code examples, I hope they will be helpful to you. At the same time, I also hope that you can make appropriate adjustments and expansions according to the actual situation to meet your actual needs. Well-written backup and recovery tools can bring convenience and efficiency to your work. I wish you good luck in your work!

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