在laravel环境下将图片存入MongoDB数据库

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#在laravel环境下将图片存入MongoDB数据库#

此处使用的是base64方法；

  先获取到上传的图片，再获取其详细信息，代码如下：

    $Info = getimagesize($file);
    $Info_data = fread(fopen($file,'r'), filesize($file));
    $base = base64_encode($Info_data);

• $file为获取的图片文件；
• getimagesize()函数用来获取图片文件信息；
• fread(,)用来读取文件
  • 第一个参数是 必需 规定要读取打开的文件。
    • fopen($file,'r') 只读，并将文件指针指向开始位置。
  • 第二个参数是 必须 规定要读取的最大字节数。
    • filesize($file) 返回指定文件的大小。

• base64_encode() 编译 成 base64 格式；

  存入MongoDB数据库的操作：
  
      $photo = new PhotoModel();
      $photo->name = $name;
      $photo->photo_base64 = $base;
      $photo->save();
  

  Emmm~ 这块不明白的话看laravel下的 ☞ MongoDB扩展

  然后就是从MongoDB数据库中拿出并解析成图片，代码如下：
  
      //取出
      $photo_Info = PhotoModel::where('name','=',$name)->take(1)->get(['photo_base64']);
      //转换并输出图片;
      $img = base64_decode($photo_Info[0]['photo_base64']);
      $img_analysis = file_put_contents('./test.jpg', $img);
  

• base64_decode() 解析 还原成字符串

• fileputcontents() 将一个字符串写入到文件中

  • 第一个是存储的目录 例如现在指的是当前目录下，生成一个test.jpg文件

  • 图片信息

    接下来就是源码：

` <?php 
　　namespace App\Http\Controllers;    
　　use Illuminate\Http\Request;
    use Illuminate\Http\UploadedFile;
    use Illuminate\Support\Facades\Storage;
    use App\Models\PhotoModel;
    /**
    * 该控制器用来接收并存储图片至本地;
    */
    class GetPhotoController extends Controller
    {
        //获取图片;
        public function GetPhoto(Request $Request)
        {
    if ($Request->hasFile('photo') && $Request->file('photo')->isValid()) {
        //获取图片值;
        $file = $Request->file('photo');
        //获取输入的name值；
        $name = $Request->input('name');
        $path = $file->path();

        //获取当前文件的扩展名;
        $extension = $file->extension();
        //设置支持的文件格式;
        // $allowed_extensions = ['png','jpg','gif'];

        // //判断图片文件格式是否支持;
        // if ($extension &&  !in_array($extension, $allowed_extensions))
        // {
        //  return ['error' => '上传的图片格式不支持(支持png,jpg,gif等)'];
        // }

        //设置时间名为文件名
        $time = time();
        $time = date("y-m-d",$time).'-'.date("H-i-s",$time).$time;
        $path = $file->storeAs('images',$time.'.'.$extension);

        //存入MongoDB数据库

        //一、转成base64
        $Info = getimagesize($file);
        $Info_data = fread(fopen($file,'r'), filesize($file));
        $base = base64_encode($Info_data);

        //二、存入数据库;
        $photo = new PhotoModel();
        $photo->name = $name;
        $photo->photo_base64 = $base;
        $photo->save();

        //三、取出
        $photo_Info = PhotoModel::where('name','=',$name)->take(1)->get(['photo_base64']);
        //四、转换并输出图片;
        $img = base64_decode($photo_Info[0]['photo_base64']);
        $img_analysis = file_put_contents('./test.jpg', $img);
        return $base;
    }else{
        return "文件格式不正确";
    }
    }}`