AaronXu
58 lines
1.9 KiB
PHP
58 lines
1.9 KiB
PHP
<?php
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// 接受数据，并且提取出action
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$data = json_decode(file_get_contents('php://input'), true);
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$action = $data['action'] ?? '';
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// 处理与用户相关的操作
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include 'db.php';
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// 如果数据库连接失败，则返回错误信息
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/** @var mysqli $conn */
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if (!isset($conn)) {
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echo json_encode(['code' => 10004, 'status' => 'error', 'message' => '数据库连接失败']);
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exit;
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}
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// 测试用户名是否已存在
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function testUsername(mysqli $conn, string $username): bool
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{
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$sql = "select * from users where username = '$username'"; // sql注入风险
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$result = mysqli_query($conn, $sql);
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if (mysqli_num_rows($result) > 0) {
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return true;
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} else {
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return false;
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}
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}
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// 如果action是register，则注册用户
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if ($action == 'register') {
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$username = $data['username'];
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$password = $data['password'];
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$email = $data['email'];
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if (testUsername($conn, $username)) {
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echo json_encode(['code' => 10001, 'status' => 'error', 'message' => '用户名已存在']);
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} else {
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$sql = "insert into users (username, password, email) values ('$username', '$password', '$email')";
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$result = mysqli_query($conn, $sql);
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if ($result) {
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echo json_encode(['code' => 0, 'status' => 'success', 'message' => '注册成功']);
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} else {
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echo json_encode(['code' => 10002, 'status' => 'error', 'message' => '注册失败']);
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}
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}
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}
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// login的逻辑
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if ($action == 'login') {
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$username = $data['username'];
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$password = $data['password'];
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$sql = "select * from users where username = '$username' and password = '$password'";
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$result = mysqli_query($conn, $sql);
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if (mysqli_num_rows($result) > 0) {
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echo json_encode(['code' => 0, 'status' => 'success', 'message' => '登录成功']);
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} else {
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echo json_encode(['code' => 10003, 'status' => 'error', 'message' => '用户名或密码错误']);
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}
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}
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