title: Multiple file upload in one request IONIC
body: <p>Is there any way to make ONE request with multiple upload in IONIC 3? My server side is PHP codeigniter.</p>
  
  <p>this is my code:</p>
  
  <pre><code>upload(){
    const fileTransfer: FileTransferObject = this.transfer.create();
  
    var uploadPhoto = JSON.stringify( this.photos );
  
   let options : FileUploadOptions = {
  
      fileKey: 'file',
      fileName: 'name.jpg',
      headers: {},
      params: {
        'model': uploadPhoto
      }
   };
  
   console.log( JSON.stringify( options ) )
  
   fileTransfer.upload(this.photos, encodeURI(this.authService.apiURL + '/serviceupload'), options)
    .then(data=&gt; {
      console.log( JSON.stringify( data),"data" );
    }, (err) =&gt; {
      // error
    })
  }
  </code></pre>