im_chat/app/enterprise/model/Posts.php

<?php

namespace app\enterprise\model;

use app\BaseModel;
use app\common\controller\Upload;

class Posts extends BaseModel
{

    // 创建朋友圈头像
    public static function createAvatar($posts_id)
    {
        $PostsFile = PostsFile::where(['posts_id' => $posts_id])->field('file_id')->select();
        if (count($PostsFile) > 1) {
            $imgFileIdArr = array_column($PostsFile, 'file_id');
            $imgFileArr = [];
            foreach ($imgFileIdArr as $file_id) {
                $src = File::where('file_id', '=', $file_id)->value('src');
                if ($src) {
                    $imgFileArr[] = $src;
                }
            }
            if (count($imgFileArr) > 1) {
                self::createPostsAvatar($posts_id,$imgFileArr);
            }
        }
    }

    // 生成朋友圈头像
    public static function createPostsAvatar($posts_id, $imageFileArr)
    {
        $dirPath=app()->getRootPath().'public/temp';
        $fileName = $posts_id . time();
        $path=$dirPath.'/'.$fileName.'.jpg';
        foreach ($imageFileArr as $key => $imageSrc) {
            $imageFileArr[$key] = getDiskUrl() .'/'. ltrim($imageSrc,'/');
        }
        $avatar = getGroupAvatar($imageFileArr,1, $path);
        $url='';
        if($avatar){
            $upload=new Upload();
            $newPath=$upload->uploadLocalAvatar($path,[],$posts_id);
            if($newPath){
                self::where('id',$posts_id)->update(['avatar'=>$newPath]);
                $url=avatarUrl($newPath);
            }
        }
        return $url;
    }
}