如何在codeigniter中获取经纬度数据

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Geolocation extends CI_Controller {

    public function get_coordinates($address) {
        $api_key = 'YOUR_API_KEY'; // 替换为你的Google Maps API密钥

        // 构建请求URL
        $url = 'https://maps.googleapis.com/maps/api/geocode/json?address=' . urlencode($address) . '&key=' . $api_key;

        // 初始化CURL
        $curl = curl_init();

        // 设置CURL选项
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

        // 发送HTTP GET请求并获取响应
        $response = curl_exec($curl);

        // 关闭CURL
        curl_close($curl);

        // 解析API响应数据
        $data = json_decode($response, true);

        // 提取经纬度信息
        $latitude = $data['results'][0]['geometry']['location']['lat'];
        $longitude = $data['results'][0]['geometry']['location']['lng'];

        // 在这里可以根据需要进行进一步处理或返回经纬度数据
        return array('latitude' => $latitude, 'longitude' => $longitude);
    }
}