一步一步学swift之：自己写Api接口-PHP

<?php //定义数据库连接所需的变量
define("DB_HOST", "localhost");
define("DB_USER", "root");
define("DB_PASSWORD", "master12!");
define("DB_DATABASE", "loginAPI"); ?>

<?php class DB_Connect
{
public $con; function __construct()
{ } function __destruct()
{
// $this->close();
} //连接数据库
public function connect()
{
require_once 'include/Config.php';
//连接mysql
$this->con = mysqli_connect(DB_HOST, DB_USER, DB_PASSWORD, DB_DATABASE) or die(mysqli_error($this->con));
if (mysqli_connect_errno()) {
die("Database connection failed");
} // 返回 database handler
return $this->con;
} //关闭数据连接
public function close()
{
mysqli_close($this->con);
} } ?>

<?php class DB_Functions { private $db; // constructor
function __construct() {
require_once 'DB_Connect.php';
// connecting to database
$this->db = new DB_Connect();
$this->db->connect();
} // destructor
function __destruct() { } /**
* 添加用户信息
*/
public function storeUser($name, $email, $password) {
$uuid = uniqid('', true);
$hash = $this->hashSSHA($password);
$encrypted_password = $hash["encrypted"]; // 加密后的密文
$salt = $hash["salt"]; // salt
$result = mysqli_query($this->db->con,"INSERT INTO users(unique_id, name, email, encrypted_password, salt, created_at) VALUES('$uuid', '$name', '$email', '$encrypted_password', '$salt', NOW())");
// 检查结果
if ($result) {
// 获取用户信息
$uid = mysqli_insert_id($this->db->con); // 获取最新的id
$result = mysqli_query($this->db->con,"SELECT * FROM users WHERE uid = $uid");
//返回刚插入的用户信息
return mysqli_fetch_array($result);
} else {
return false;
}
} /**
* 通过email和password获取用户信息
*/
public function getUserByEmailAndPassword($email, $password) {
$result = mysqli_query($this->db->con,"SELECT * FROM users WHERE email = '$email'") or die(mysqli_connect_errno());
// check for result
$no_of_rows = mysqli_num_rows($result);
if ($no_of_rows > 0) {
$result = mysqli_fetch_array($result);
$salt = $result['salt'];
$encrypted_password = $result['encrypted_password'];
$hash = $this->checkhashSSHA($salt, $password);
// check for password
if ($encrypted_password == $hash) {
return $result;
}
} else {
return false;
}
} /**
* 通过email判断用户是否存在
*/
public function isUserExisted($email) {
$result = mysqli_query($this->db->con,"SELECT email from users WHERE email = '$email'");
$no_of_rows = mysqli_num_rows($result);
if ($no_of_rows > 0) {
// 用户存在
return true;
} else {
//用户不存在
return false;
}
} /**
* 加密
* @param password
* returns salt and encrypted password
*/
public function hashSSHA($password) { $salt = sha1(rand());
$salt = substr($salt, 0, 10);
$encrypted = base64_encode(sha1($password . $salt, true) . $salt);
$hash = array("salt" => $salt, "encrypted" => $encrypted);
return $hash;
} /**
* 解密
* @param salt, password
* returns hash string
*/
public function checkhashSSHA($salt, $password) { $hash = base64_encode(sha1($password . $salt, true) . $salt); return $hash;
} } ?>

<?php if (isset($_POST['tag']) && $_POST['tag'] != '') {
// tag是接口请求时post的值（方法名称），用来区别调用方法
$tag = $_POST['tag']; //引用DB_Functions.php
require_once 'include/DB_Functions.php';
$db = new DB_Functions(); // 定义输入数组
$response = array("tag" => $tag, "error" => FALSE); // 判断tag值
if ($tag == 'login') {
//获取login方法的post参数
$email = $_POST['email'];
$password = $_POST['password']; // 通过email 和password获取用户信息
$user = $db->getUserByEmailAndPassword($email, $password);
if ($user != false) {
//找到用户信息
$response["error"] = FALSE;
$response["uid"] = $user["unique_id"];
$response["user"]["name"] = $user["name"];
$response["user"]["email"] = $user["email"];
$response["user"]["created_at"] = $user["created_at"];
$response["user"]["updated_at"] = $user["updated_at"];
echo json_encode($response);
} else {
//没有找到用户信息
//输出错误信息
$response["error"] = TRUE;
$response["error_msg"] = "帐号或密码不正确!";
echo json_encode($response);
}
} else if ($tag == 'register') {
//注册帐号
$name = $_POST['name'];
$email = $_POST['email'];
$password = $_POST['password']; // 判断用户是否存在
if ($db->isUserExisted($email)) {
// 如果用户存在就返错误提示
$response["error"] = TRUE;
$response["error_msg"] = "用户已存在";
echo json_encode($response);
} else {
// 新增用户
$user = $db->storeUser($name, $email, $password);
if ($user) {
//新增成功返回用户信息
$response["error"] = FALSE;
$response["uid"] = $user["unique_id"];
$response["user"]["name"] = $user["name"];
$response["user"]["email"] = $user["email"];
$response["user"]["created_at"] = $user["created_at"];
$response["user"]["updated_at"] = $user["updated_at"];
echo json_encode($response);
} else {
// 新增失败，返回错误信息
$response["error"] = TRUE;
$response["error_msg"] = "服务器繁忙，操作失败";
echo json_encode($response);
}
}
} else {
// tag值无效时
$response["error"] = TRUE;
$response["error_msg"] = "未找到您要的方法";
echo json_encode($response);
}
} else {
$response["error"] = TRUE;
$response["error_msg"] = "您的参数不正确!";
echo json_encode($response);
}
?>