从一个阵列移动命名项的编号量到另一个 [英] moving a numbered amount of named items from one array into another
问题描述
我不完全知道如何在逻辑将在这方面努力。我的脑子是油炸,我不能清晰地思考。
我处理某些POST数据,和此阵列中的其中一个字段是一个数量串。我可以读取该字符串并确定是否存在需要处理超过1小部件。
如果($数量< = 1){// $ _ POST [WIDGET1]}
现在说有4个部件。该数量字段将反映这个数字,但我将如何通过他们循环,并将其分配到一个新的数组自己?
$ _ POST [WIDGET1],$ _ POST [WIDGET2],$ _ POST [WIDGET3],$ _ POST [widget4]
我如何采取数量号码,用它来抓取,许多和那些特定命名项目从后阵,使用一些外卡或preFIX什么的?我不知道这是否是一个为
或,而
,或什么样的操作。我如何通过$ _ POST循环['小部件*的 X 的*'],其中X是我的数量是多少?
最终的结果是即时通讯寻求具有结构类似这样的数组:
$部件[数据1]
$部件[数据2]
$部件[数据3]
$部件[数据4]
使用为
循环,你可以访问 $ _ POST
具有可变密钥,如 $ _ POST [小部件$ I]
$部件=阵列();
为($ i = 1; $ I< = $数量; $ I ++){
//追加到一个数组
$部件[] = $ _ POST [小部件$ I];
}
然而,一个更好的长期解决办法是通过添加 []
来改变HTML表单,使得它在第一时间传递一个数组回PHP的表单输入的名称
属性:
<输入类型=文本名称='小部件[]'ID ='WIDGET1'值='WIDGET1/>
<输入类型=文本名称='小部件[]'ID ='WIDGET2'值='WIDGET2/>
<输入类型=文本名称='小部件[]'ID ='WIDGET3'值='WIDGET3/>
通过 $访问的在PHP _ POST ['部件']
,已经是阵!
的var_dump($ _ POST ['部件']);
I'm not exactly sure how the logic would work on this. My brain is fried and i cant think clearly.
I am handling some POST data, and one of the fields in this array is a quantity string. I can read this string and determine if there are more than 1 widgets that need handled.
if($quantity <= 1){ //$_POST[widget1] }
Now say there are 4 widgets. The quantity field would reflect this number, but how would i loop through them and assign them to a new array themselves?
$_POST[widget1], $_POST[widget2], $_POST[widget3], $_POST[widget4]
How do i take that quantity number, and use it to grab that many and those specific named items from the post array, using some kind of wild card or prefix or something? I dont know if this is a for
, or while
, or what kind of operation. How do I loop through $_POST['widget*X*'], where X is my quantity number?
The end result is im looking to have an array structured like this:
$widgets[data1]
$widgets[data2]
$widgets[data3]
$widgets[data4]
Using a for
loop, you can access the $_POST
keys with a variable, as in $_POST["widget$i"]
$widgets = array();
for ($i=1; $i<=$quantity; $i++) {
// Append onto an array
$widgets[] = $_POST["widget$i"];
}
However, a better long-term solution would be to change the HTML form such that it passes an array back to PHP in the first place by adding []
to the form input's name
attribute:
<input type='text' name='widgets[]' id='widget1' value='widget1' />
<input type='text' name='widgets[]' id='widget2' value='widget2' />
<input type='text' name='widgets[]' id='widget3' value='widget3' />
Accessed in PHP via $_POST['widgets']
, already an array!
var_dump($_POST['widgets']);
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