PHP复选框数组验证 [英] PHP Checkbox array validating

问题描述

有一些复选框，我需要用'0'（未选中）和'1'（选中）来验证格式。

 < input type =checkboxname =subcategory1 []> Text 1< br> 
< input type =checkboxname =subcategory1 []> Text 2< br> 
< input type =checkboxname =subcategory1 []> Text 3< br> 
  

我尝试使用此代码验证它（在因特网上找到）：

  $ sc1 =; （$ i = 0; $ i <= 2; $ i ++）
 
 if（isset（$ _ POST ['subcategory1'] [$ i]））{$ sc1。 ='1'; } 
 else {$ sc1。='0'; } 
} 
  

首先这个效果很好，但是当我添加更多的复选框时，不工作。它在$ sc1的开头设置全部1。对它们进行计数。

可能存在3个div（一列为一个div）的问题，但仍然有相同的名称？

Edit1：$ sc1 chould看起来像010

解决方案

这是因为您使用的是$ sc1。=在循环。你正在添加你的价值。所以一旦它设置为1，任何0将被添加。
摆脱循环中的所有停顿（。= should be be =）

update：你应该把键放到数组中

 < input type =checkboxname =subcategory1 [1]>文字1< br> 
< input type =checkboxname =subcategory1 [2]> Text 2< br> 
< input type =checkboxname =subcategory1 [3]>文字3< br> 
  

Have some checkboxes, which I need to validate into format with '0' (unchecked) and '1' (checked).

<input type="checkbox" name="subcategory1[]" >Text 1<br>
<input type="checkbox" name="subcategory1[]" >Text 2<br>
<input type="checkbox" name="subcategory1[]" >Text 3<br>

I tried validate it with this code (found on internet):

$sc1 = "";
for($i=0; $i<=2; $i++)
  {
  if(isset($_POST['subcategory1'][$i])){ $sc1 .= '1'; }
  else { $sc1 .= '0'; }   
  }

Firstly that works well, but when I add more checkboxes, this isn't working. It set all "1" at the begining of $sc1. Count them well.

Could be problem that they are in 3 divs (one div for one column), but still with same name?

Edit1: $sc1 chould looks like 010

解决方案

it's because you're using $sc1 .= in the loop. you're adding your values. so once it' set to 1, any 0 will just be added. get rid of the full stops in your loop (.= should just be =)

update: you should put the keys in the array

<input type="checkbox" name="subcategory1[1]" >Text 1<br>
<input type="checkbox" name="subcategory1[2]" >Text 2<br>
<input type="checkbox" name="subcategory1[3]" >Text 3<br>

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