PHP and UniApp implement data permission control and access restrictions

PHP and UniApp implement data permission control and access restrictions

When developing web applications or mobile applications, it is often necessary to perform permission control and access restrictions on data to ensure data security and privacy. sex. This article will introduce how to use PHP and UniApp framework to implement data permission control and access restrictions, and give corresponding code examples.

1. PHP implements data permission control

1. User permissions management system
   First of all, we need to design a user permissions management system to manage and control user permissions. The following is an example of the structure of a simple user table:

CREATE TABLE user (
id int(11) NOT NULL AUTO_INCREMENT,
username varchar(255) NOT NULL,
password varchar(255) NOT NULL,
role varchar(255) NOT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

In this table, we can store the user's login name, password and role information. Role information can be used to indicate the user's authority level, such as ordinary user, administrator, etc.

2. Data table permission management
   Next, we need to design a corresponding permission table for each data table to manage user access permissions to the data table. The following is an example of the structure of a simple permission table:

CREATE TABLE table_permission (
id int(11) NOT NULL AUTO_INCREMENT,
user_id int(11) NOT NULL,
table_name varchar(255) NOT NULL,
read_permission tinyint(1) NOT NULL,
write_permission tinyint(1) NOT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

where In the table, we can store the user ID, data table name, and user's read and write permissions on the data table. By querying this table, we can determine whether the user has read and write permissions to a certain data table.

3. Implementing permission control
   In PHP, we can implement permission control through session. When the user logs in successfully, we can store the user's permission information in the session and make judgments where permission control is required.

The following is an example of a simple permission judgment function:

function check_permission($table_name, $read_permission_required, $write_permission_required) {
// Get the current user ID
$user_id = $_SESSION['user_id'];

// Query the user's permissions on the data table
$result = mysqli_query($connection, "SELECT * FROM table_permission WHERE user_id = $user_id AND table_name = '$table_name'");
$row = mysqli_fetch_assoc($result);

// Determine whether the user permissions meet the requirements
if ($row['read_permission'] > = $read_permission_required && $row['write_permission'] >= $write_permission_required) {

return true;

} else {

return false;

}
}

Permissions are required Where control is concerned, we can call this function to determine whether the user has the corresponding permissions.

2. UniApp implements data permission control and access restrictions

1. Front-end request permission
   In UniApp, we can obtain the user's permission information by sending a request and send it Stored locally. The following is a simple request example:

uni.request({
url: 'https://example.com/api/get_permission',
method: 'GET',
header: {

'Authorization': 'Bearer ' + token // 这里需要传递用户的登录凭证

},
success: function (res) {

if (res.statusCode === 200) {
  // 处理获取到的权限信息
  uni.setStorageSync('permission', res.data.permission);
}

}
});

In this example, We obtain the user's permission information by sending a GET request to the server's API interface and store it locally.

2. Front-end permission control
   In UniApp, we can control user access to data by making permission judgments on pages or components. Here is a simple example:

export default {
data() {

return {
  permission: uni.getStorageSync('permission')
}

},
methods: {

checkPermission() {
  if (this.permission.read_permission && this.permission.write_permission) {
    // 执行需要控制权限的操作
  } else {
    // 显示没有权限的提示信息
  }
}

}
}

In this example, we take out the permission information stored in the front end and make a judgment where the permissions need to be controlled.

In summary, by using PHP and the UniApp framework, we can achieve permission control and access restrictions on data. PHP is responsible for back-end permission management and control, and UniApp is responsible for front-end permission acquisition and control. By properly designing and implementing the permission system, we can protect the security and privacy of data and improve the user experience of the application.

This article is just a simple example. The specific implementation method and code can be adjusted and improved according to actual needs. Hope it helps readers!

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