使用Laravel将图像转换为64位字符串

public function newEvent(Request $request){
    $parametre =$request->all();

    if ($request->hasFile('image')) {
        if($request->file('image')->isValid()) {
            try {
                $file = $request->file('image');
                $image = base64_encode($file);
                echo $image;


            } catch (FileNotFoundException $e) {
                echo "catch";

            }
        }
    }

$image = base64_encode(file_get_contents($request->file('image')->pat‌​h()));