Question

我正在创建一个上传系统，每当用户上传图像扩展名以外的文件类型（例如jpg / jpeg / gif）时，脚本就会中断。在我重新启动phpstorm之前，PHP不会加载，而且我的代码非常小。我不希望用户上传.exe或任何其他文件扩展名。

这是我的代码：

if (!$_FILES['file']['tmp_name'])
{
    $uploaderrors[] = "Please choose image";
}
$check = getimagesize($_FILES['file']['tmp_name']);
if($check == false)
{
    $uploaderrors[] = "Please choose image";
}
}

脚本中断，破坏了UX。无论如何我能解决这个问题吗？

Answer 1

只需使用Javascript（可能是JQuery）来检查用户在PHP启动之前上传正确的文件格式......这将是在客户端执行此操作的一种方式。这是一个例子：

        <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
        <script type="text/javascript">
            (function($) {
                $(document).ready(function(){
                    // ASSUMING THAT YOUR FILE INPUT HAS A CLASS-NAME OF "file_upload"
                    // WE CAN SIMPLY GRAB IT INTO A VARIABLE LIKE SO:
                    var pixFile = $(".file_upload");

                    // NOW, WHEN THE USER INTERACTS WITH THIS FILE-INPUT
                    // WE CAN REACT TO THE CHANGE EVENT...
                    pixFile.on("change", function(evt){
                        var dis_val     = $(this).val();

                        // IF USER TRIES TO UPLOAD ANYTHING OUTSIDE ACCEPTABLE/VALID IMAGE FORMATS
                        // WE INFORM HIM OF OUR PREFERENCES: HERE WE ARE USING ALERT...
                        if( !/(\.)(jpg|jpeg|png|gif|bmp)$/.test(dis_val) ){         // ADD OTHER FORMATS YOU WISH TO SUPPORT:  'tiff, psd, pdf'
                            alert("You can only upload image Files (JPG, JPEG, PNG, GIF, BMP)");    // ADD OTHER FORMATS YOU WISH TO SUPPORT

                            // THEN IMMEDIATELY RESET THE VALUE OF THE UPLOADED FILE TO NULL
                            $(this).val(null);
                            return false;
                        }else{
                            // OTHERWISE: WE KNOW THAT USER UPLOADED THE ACCEPTABLE FILE FORMAT(S)
                            // YOU MAY OR MAY NOT WANT TO REACT TO THIS... THE CHOICE IS YOURS
                            // AND YOU MAY AS WELL JUST DELETE THE ENTIRE ELSE CLAUSE (IF YOU SO WISH)
                        }
                    });
                });
            })(jQuery);
        </script>

如果用户上传.exe，php将停止工作

1 个答案: