如何使用PHP和Vue实现短信验证码功能

<?php
session_start();

// 生成随机的验证码
$verify_code = mt_rand(100000, 999999);

// 将验证码存入session中
$_SESSION['verify_code'] = $verify_code;

// 返回验证码结果
echo json_encode(['code' => $verify_code]);
?>

<?php
session_start();

// 获取手机号码
$phone_number = $_POST['phone_number'];

// 获取之前生成的验证码
$verify_code = $_SESSION['verify_code'];

// 调用短信接口发送短信验证码
// 代码略，根据实际短信接口文档编写发送短信的代码

// 返回发送结果
echo json_encode(['success' => true]);
?>

<script src="https://cdn.jsdelivr.net/npm/vue@2.6.14/dist/vue.js"></script>
<script src="https://cdn.jsdelivr.net/npm/axios@0.21.1/dist/axios.min.js"></script>

new Vue({
  el: '#app',
  data: {
    phoneNumber: '',
    verifyCode: '',
    serverUrl: '/send_sms.php'
  },
  methods: {
    // 生成验证码
    generateVerifyCode: function() {
      axios.get('/verify_code.php')
        .then(function(response) {
          this.verifyCode = response.data.code;
        }.bind(this))
        .catch(function(error) {
          console.log(error);
        });
    },
    // 发送短信验证码
    sendSmsCode: function() {
      axios.post(this.serverUrl, {
          phone_number: this.phoneNumber
        })
        .then(function(response) {
          console.log(response.data);
        })
        .catch(function(error) {
          console.log(error);
        });
    }
  }
});

<div id="app">
  <form>
    <div class="form-group">
      <label for="phone">手机号码</label>
      <input type="text" class="form-control" id="phone" v-model="phoneNumber">
    </div>
    <div class="form-group">
      <label for="code">验证码</label>
      <input type="text" class="form-control" id="code" v-model="verifyCode">
      <button type="button" class="btn btn-primary" @click="generateVerifyCode">获取验证码</button>
    </div>
    <button type="button" class="btn btn-primary" @click="sendSmsCode">发送验证码</button>
  </form>
</div>