问题
How to select multiple files for upload :
回答1:
This depends on the browser. Newer versions of firefox and chrome support this because they started to implement HTML5 specification. This is the syntax:
<input type="file" multiple=""/>
Firefox >= 3.6, Chrome >= 2, Safari >= 4 support multiple file input.
For older browsers the only good solutions are flash or javascript plugins. Here is a good resource for jquery uploaders ( some support multiple files ): http://creativefan.com/10-ajax-jquery-file-uploaders/
回答2:
In HTML5 you can set the multiple attribute on <input type="file">. This works in browsers supporting HTML5.
<input type="file" name="upload" multiple="multiple" />
In HTML4 your best bet is Flash or Java Applet. There are 3rd party libs available like Uploadify, SWFupload, JUpload and JumpLoader.
回答3:
I would definately at this point go with new HTML5 "multiple" attribute:
<input type="file" name="upload[]" multiple="multiple" />
The only viable alternative is FLASH plugins like swfupload.
However - there are multiple prublems with using FLASH for uploads, the main one foor me would be cookie bug:
FLASH plugins don't send cookies correctly. Each browser has it's own cookie storage.FLASH always sends cookies from IE even if you use Google Chrome for example. - result is that you loose cookies and sessions. there is a workaround - but it requires you to send session ID as GET or POST parameters which in turn makes your site vulnerable for session fixation.
回答4:
You could also use javascript plugins such as: http://code.google.com/p/noswfupload/
回答5:
Use the file input form element more than once, give it a different name and you have multiple upload fields on one page. No need to learn anything else.
回答6:
- PHP is the back-end, PHP is not the thing which restricts you to use only "one" upload a time
- HTML/JavaScript are the front/mid-end which cause the restrictions. (So add HTML to your questions tags)
- If you use Flash (AS = ActionScript) you can still have PHP as back-end, as processor which handles the uploaded files.
回答7:
There is no html/javascript workaround. You would have to look to flash or java to be able to do this.
回答8:
As others have said, you have to use Flash to get multiple uploads. An alternative to uploadify is SWFUpload.
回答9:
Flash is the only option except HTML5.
来源：https://stackoverflow.com/questions/2071505/select-multiple-files-in-file-upload-in-php