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Berikut ialah kod (saya ingin bertanya bagaimana untuk mengubah suainya. Saya orang baru, terima kasih semua terlebih dahulu!):
<?php

ruang nama AppHttpControllers;

gunakan IlluminateHttpRequest;

gunakan AppHttpRequests;

class RequestController memanjangkan Pengawal
{

public function getFileupload(){
    $postUrl='/laravelFirst/public/index.php/request/fileupload';
    $csrf_field=csrf_field();
    $html=<<<FILE
    <form action="$postUrl" method="post" enctype="multipart/form-data">
    $csrf_field
    <input type="file" name="file"><br/>
    <input type="submit" value="提交">
    </form>

FAIL;

    return $html;          
}
public function postFileupload(Request $request){
    if(!$request->hasFile('file')){
        exit('上傳文件為空!');
    }
    $file=$request->file('file');
    if(!$file->isValid()){
        exit('上傳文件出錯!');
    }
    $destPath = realpath(public_path('images'));
    if(!file_exists($destPath)){
    mkdir($destPath,0755,true);
}
    $filename=$file->getClientOriginalName();
    if(!$file->move($destPath,$filename)){
        exit('保存文件失敗！');
    }
    exit('文件上傳成功!');
}

}