一个简单的图片文件上传服务with symfony2 component(不含验证)

<?php

namespace Admin\Bundle\ContentBundle\File;

use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\Filesystem\Filesystem;

class SaveFileHandler
{
    protected $container;
    public function __construct( ContainerInterface $container)
    {
        $this->container = $container;
    }

    public function save( $fileObject , $path)
    {

        $dir = $this->container->get('kernel')->getRootDir() . '/../web/' . $path;

        $sub_path = md5( $fileObject->getClientOriginalName() . microtime() );

        $dir .= '/' . $sub_path . '/';
        $fs = new Filesystem();

        if( !$fs->exists( $dir ) )
        {
            try {
                $fs->mkdir( $dir );
            } catch (IOExceptionInterface $e) {
                echo "An error occurred while creating your directory at ".$e->getPath();
            }
        }

        $file = str_replace( 'image/' , mt_rand(1,99) .'.' , $fileObject->getMimeType() );

        $fileObject->move( $dir , $file );

        return '/'.$path.'/' . $sub_path . '/' . $file;
    }

    public function remove( $file)
    {
        $fs = new Filesystem();
        $full_path =  $this->container->get('kernel')->getRootDir() . '/../' . $file ;

        $full_path = preg_replace('/\/\d+\.\w+$/' , '' , $full_path);


        if( $fs->exists( $full_path) )
        {

            try {
                $fs->remove( $full_path );
            } catch (IOExceptionInterface $e) {
                echo "An error occurred while creating your directory at ".$e->getPath();
            }
        }

    }
}

services:
    file.save_file_handler:
        class: Admin\Bundle\ContentBundle\File\SaveFileHandler
        arguments: [@service_container]

<?php

//用法
public function doSomethingAction()
{
        
    $data = $form->getData();
    $image = $data->getImage();
    
    if( $old_image )
    {
        $this->get('file.save_file_handler')->remove( $tmp_image);
    }

    $newImageName = $this->get('file.save_file_handler')->save( $image , 'upload_dir' );
}