如何区分两个同名的多选列表 [英] How to distinguish between two multiple selection lists with same name

问题描述

对于我正在构建的系统，我需要查看哪些选项来自第一个列表（带有POST请求），以及哪些选项来自第二个列表。

 < form method =post> 
< select name =cars []multiple> 
< option selected> test< / option> 
< option selected> test2< / option> 
< option> test3< / option> 
< option> test4< / option> 
< / select> 
< select name =cars []multiple> 
< option> hai< / option> 
< option> hai2< / option> 
< option selected> hai3< / option> 
< option selected> hai4< / option> 
< / select> 
< input type =submit> 
< / form> 
  

现在他们进来了：

 数组
（
 [cars] =>数组
（
 [0] => test 
 [ 1] => test2 
 [2] => hai3 
 [3] => hai4 
）
）
  / pre> 
 
 
实际上，我想从'haiX'选项中检索'testX'选项。现在我看不到第一个列表中的哪一个来自第二个列表。当然，我知道我也可以使第二个列表的名称不同于第一个列表的名称，但是我想这样做是有原因的。
解决方案
通过以下形式创建多维数组来分类： 
 
 
 < ; form method =post> 
< select name =cars [0] []multiple> 
< option selected> test< / option> 
< option selected> test2< / option> 
< option> test3< / option> 
< option> test4< / option> 
< / select> 
< select name =cars [1] []multiple> 
< option> hai< / option> 
< option> hai2< / option> 
< option selected> hai3< / option> 
< option selected> hai4< / option> 
< / select> 
< input type =submit> 
< / form> 
  
然后像这样读取它：$ _POST ['cars'] [0] for the first set和$ _POST ['cars'] [1]为第二个$ / b $ b $
For a system I'm building I need to see which options came in (with POST request) from the first list and wich options came in from the second list.
<form method="post">
    <select name="cars[]" multiple>
        <option selected>test</option>
        <option selected>test2</option>
        <option>test3</option>
        <option>test4</option>
    </select>
    <select name="cars[]" multiple>
        <option>hai</option>
        <option>hai2</option>
        <option selected>hai3</option>
        <option selected>hai4</option>
    </select>
    <input type="submit">
</form>
Now they're coming in like this:
Array
(
    [cars] => Array
        (
            [0] => test
            [1] => test2
            [2] => hai3
            [3] => hai4
        )
)
Actually I want to retrieve the 'testX' options apart from the 'haiX' options. Now I can't see which came from the first list and wich from the second. Off course I know I could also make the name of the second list different than the name of the first list, but it's for good reason that I want to do it like this..
解决方案
Divide the categories by creating a multidimensional array in the form:
<form method="post">
    <select name="cars[0][]" multiple>
        <option selected>test</option>
        <option selected>test2</option>
        <option>test3</option>
        <option>test4</option>
    </select>
    <select name="cars[1][]" multiple>
        <option>hai</option>
        <option>hai2</option>
        <option selected>hai3</option>
        <option selected>hai4</option>
    </select>
    <input type="submit">
</form>
And then reading it like this: $_POST['cars'][0] for the first set and $_POST['cars'][1] for the second


                        
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