thinkphp 输出完整图片路径

<?php
namespace app\index\controller;

use think\Controller;
use think\Request;

class ImageController extends Controller
{
    public function getImagePath()
    {
        // 假设图片文件名为 example.jpg
        $filename = 'example.jpg';
        // 获取 public 目录的绝对路径
        $publicPath = $_SERVER['DOCUMENT_ROOT'] . '/public';
        // 拼接完整路径
        $fullPath = $publicPath . '/uploads/' . $filename;

        // 输出完整路径
        echo $fullPath;
    }
}

<?php
namespace app\index\controller;

use think\Controller;
use think\Request;

class ImageController extends Controller
{
    public function getImagePath()
    {
        $filename = 'example.jpg';
        $relativePath = '/public/uploads/' . $filename;
        $fullPath = realpath($_SERVER['DOCUMENT_ROOT'] . $relativePath);

        if ($fullPath) {
            echo $fullPath;
        } else {
            echo '路径获取失败';
        }
    }
}