php图片上传

<input type="file" name="photo" />

use Illuminate\Http\Request;

public function postPublish(Request $request){

$userid = Auth::user()->pk_id;
$title = $request->get('col_title');
$message = $request->get('col_message');
$file = $request->file('photo');

if ($file->getClientOriginalExtension() && !in_array($file->getClientOriginalExtension(), $allowed_extensions)) {
    return ['error' => '只能上传png,jpg,gif格式。'];
}

 $destinationPath = 'storage/uploads/'; //上传位置
 $extension = $file->getClientOriginalExtension();
 $fileName = str_random(10).'.'.$extension;
 $file->move($destinationPath, $fileName);
 $filePath = asset($destinationPath.$fileName);
//保存到数据库
 if(CompanyInformation::createInformation($userid,$filePath,$title,$message))
     return redirect('/abc');
 else
     return Redirect::back()->withInput()->withError(['error' => '保存失败']);

}