获取微信上传的图片（公众号）

代码

<?php
namespace app\hryh\controller;

use WechatSDK\Wechat as wechatModel;

class Image extends  \app\hryh\controller\Base
{
    public static $weObj;
  
    public static function getImage($id,$media_id)
    {
        $wechat = config("wechat");
        $options = array(
            'appid' => $wechat['appkey'],
            'appsecret' => $wechat['appsecret'],
        );
        self::$weObj = new wechatModel($options);
        $img_content =  self::$weObj->getMedia($media_id);
        if(!$img_content){
            ajaxError('图片上传失败，请重试！');
        }
        $myImg = ROOT_PATH . 'public/uploads/image/user_'.self::$userInfo['number'].'.jpg';
        
        //获取图片
        $res = self::saveWeixinFile($myImg,$img_content);
        //判断图片是否旋转（苹果原相机上传的图片裁剪会自动旋转）
        $Orientation = self::updateImg($myImg);

         //裁剪
        $image = \think\Image::open($myImg);
        $image->thumb(276,368, \think\Image::THUMB_CENTER)->save($myImg);

        $pic_url = config("API_URL")."/uploads/image/user_".self::$userInfo['number'].".jpg?v=".time();
        return $pic_url;
    }

    //保存图片到本地
    public static function saveWeixinFile($filename, $filecontent)
    {
        $local_file = fopen($filename, 'w');
        if (false !== $local_file){
            if (false !== fwrite($local_file, $filecontent)){
                fclose($local_file);
            }
        }
    }

    //判断图片是否旋转
    public static function updateImg($str)
    {
//        $str = '文件路径';

        try{
            $savePath=$str;
            $image = imagecreatefromstring(file_get_contents($str));
            $exif = exif_read_data($str);
            if($exif){
                if (!empty($exif['Orientation'])) {
                    switch ($exif['Orientation']) {
                        case 8:
                            $image = imagerotate($image, 90, 0);
                            break;
                        case 3:
                            $image = imagerotate($image, 180, 0);
                            break;
                        case 6:
                            $image = imagerotate($image, -90, 0);
                            break;
                    }
                    imagejpeg($image, $savePath);
                    imagedestroy($image);
                }
            }
            addLog("***** Orientation *****");
            addLog("data:".$exif['Orientation']);
        }catch (Exception $e){
            $exif['Orientation'] = null;
        }

        return $exif['Orientation'];
    }

}