qimall/common/logic/wechat/WechatMaterialLogic.php

<?php

namespace common\logic\wechat;

use common\helpers\FileHelper;
use Yii;

class WechatMaterialLogic
{
    /**
     * html里面的图片转为微信公众号内部图片
     * @param string $content
     * @return array|string|string[]
     */
    public function handleMaterialImgs(string $content)
    {
        /** @var \jianyan\easywechat\Wechat $wechat */
        $wechat = Yii::$app->wechat;
        $app = $wechat->getApp();

        $preview_imgs = [];
        $pattern = "/[img|IMG].*?src=['|\"](.*?(?:[.gif|.jpg]))['|\"].*?[\/]?>/";// 表达式
        preg_match_all($pattern, $content,$match);
        if(!empty($match[1])) $preview_imgs = array_merge($preview_imgs, $match[1]);
        if ($preview_imgs) {
            Yii::error('内容里面的图片：' . json_encode($preview_imgs));

            $replace_imgs = $this->uploadMaterialImgs($app, $preview_imgs);
            Yii::error('内容上传后图片：' . json_encode($replace_imgs));
            if ($replace_imgs) {
                foreach ($replace_imgs as $select_img => $replace_img) {
                    $content = str_replace($select_img, $replace_img, $content);
                }
            }
        }
        return $content;
    }

    /**
     * 上传图片到微信公众号草稿箱
     * @param $app
     * @param $outsideImgs
     * @return array
     */
    public function uploadMaterialImgs($app, $outsideImgs)
    {
        $data = [];
        foreach ($outsideImgs as $img) {
            $file = FileHelper::downFile(Yii::getAlias('@backend').'/web/uploads',md5(time()).rand(1000,9999), $img);
            $result = $app->material->uploadImage($file);
            if (!empty($result['url'])) $data[$img] = $result['url'];
            unlink($file);// 删除临时保存图片
        }
        return $data;
    }
}