php 表单发布时如何获取复选框元素中未选中复选框的值？
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How get value for unchecked checkbox in checkbox elements when form posted?
提问by Fredy
I have a form like below :
我有一个像下面这样的表格：
<form action="" method="post">
<input type="checkbox" id="status_1" name="status_1" value="1" />
<input type="checkbox" id="status_2" name="status_2" value="1" />
<input type="checkbox" id="status_3" name="status_3" value="1" />
</form>
When i check all checkbox and post the form, the result is like this:
当我选中所有复选框并发布表单时，结果是这样的：
Array ([status_3] => 1 [status_2] => 1 [status_1] => 1 )
Then i uncheck second checkbox and post the form, the result is like this:
然后我取消选中第二个复选框并发布表单，结果如下：
Array ( [status_3] => 1 [status_1] => 1 )
Is it possible to make result like this below when i uncheck second checkbox :
当我取消选中第二个复选框时，是否有可能产生如下结果：
Array ( [status_3] => 1 [status_2] => 0 [status_1] => 1 )
There are ideas to do it?
有没有做的想法？
回答by Royal Bg
First way - hidden fields (disadvantage: the user can manipulate the value of the field (but one can manipulate the value of the checkbox too, so it's not really a problem, if you only expect 1 or 0))
第一种方式 - 隐藏字段（缺点：用户可以操纵字段的值（但也可以操纵复选框的值，所以这不是真正的问题，如果你只期望 1 或 0））
<form action="" method="post">
<input type="hidden" name="status_1" value="0" />
<input type="checkbox" id="status_1" name="status_1" value="1" />
<input type="hidden" name="status_2" value="0" />
<input type="checkbox" id="status_2" name="status_2" value="1" />
<input type="hidden" name="status_3" value="0" />
<input type="checkbox" id="status_3" name="status_3" value="1" />
<input type="submit" />
</form>
<?php
var_dump($_POST);
/*
* checking only the second box outputs:
*
* array (size=3)
'status_1' => string '0' (length=1)
'status_2' => string '1' (length=1)
'status_3' => string '0' (length=1)
*/
Second way - to assign default value for non-set indexes:
第二种方法 - 为非设置索引分配默认值：
<form action="" method="post">
<input type="checkbox" id="status_1" name="status_1" value="1" />
<input type="checkbox" id="status_2" name="status_2" value="1" />
<input type="checkbox" id="status_3" name="status_3" value="1" />
<input type="submit" />
</form>
<?php
for($i = 1; $i<=count($_POST); $i++) {
$_POST["status_$i"] = isset($_POST["status_$i"]) ? $_POST["status_$i"] : 0;
}
var_dump($_POST);
/**
* Here we will be checking only the third checkbox:
*
* array (size=3)
'status_3' => string '1' (length=1)
'status_1' => int 0
'status_2' => int 0
*/
回答by nithin
I think adding hidden fields like this will work
我认为添加这样的隐藏字段会起作用
<input type="hidden" id="status_1_" name="status_1" value="0">
<input type="checkbox" id="status_1" name="status_1" value="1" />
<input type="hidden" id="status_2_" name="status_2" value="0">
<input type="checkbox" id="status_2" name="status_2" value="1" />
<input type="hidden" id="status_3_" name="status_3" value="0">
<input type="checkbox" id="status_3" name="status_3" value="1" />
回答by Somy A
I thinks it impossible to get array like what you want from html forms. But this some tricks can be used:
我认为不可能从 html 表单中获得你想要的数组。但是可以使用一些技巧：
$defaultForm = array(
'status_1' => 0,
'status_2' => 0,
'status_3' => 0,
);
// example array from $_POST
$form = array(
'status_1' => 1,
'status_3' => 1,
);
$form = array_merge($defaultForm, $form);
Result:
结果：
array(3) {
'status_1' => int(1)
'status_2' => int(0)
'status_3' => int(1)}
数组（3）{
'status_1' => int(1)
'status_2' => int(0)
'status_3' => int(1)}
回答by luttkens
Try this. If the checkbox is not checked, then the hidden field with the same name will be passed instead.
尝试这个。如果未选中该复选框，则将传递具有相同名称的隐藏字段。
<form action="" method="post">
<input type="hidden" id="hidden_status_1" name="status_1" value="0" />
<input type="checkbox" id="status_1" name="status_1" value="1" />
<input type="hidden" id="hidden_status_2" name="status_2" value="0" />
<input type="checkbox" id="status_2" name="status_2" value="1" />
<input type="hidden" id="hidden_status_3" name="status_3" value="0" />
<input type="checkbox" id="status_3" name="status_3" value="1" />
</form>
回答by Jay Harris
the question may already be answered but i just wanted to take a stab at it...server side only solution:
问题可能已经得到解答，但我只是想尝试一下……服务器端唯一的解决方案：
$p = $_POST;
$a = array();
$a['status_3'] = (int) ($p['status_3'] === 1);
$a['status_2'] = (int) ($p['status_2'] === 1);
$a['status_1'] = (int) ($p['status_1'] === 1);
Testing
测试
// if input is Array("status_1"=>1) output will be
Array ( [status_1] => 1 [status_3] => 0 [status_2] => 0 )
// if input is Array("status_1"=>1, "status_2"=>1) output will be
Array ( [status_1] => 1 [status_3] => 0 [status_2] => 1)
回答by Fredy
Thanks all. Thank to @RoyalBg give me solution. Like this :
谢谢大家。感谢@RoyalBg 给我解决方案。像这样 ：
<input type="hidden" name="status_1" value="0" />
<input type="checkbox" id="status_1" name="status_1" value="1" /> Check 1 <br />
<input type="hidden" name="status_2" value="0" />
<input type="checkbox" id="status_2" name="status_2" value="1" /> Check 2 <br />
<input type="hidden" name="status_3" value="0" />
<input type="checkbox" id="status_3" name="status_3" value="1" /> Check 3 <br />
It's work perfectly.. :)
它完美地工作.. :)
回答by Inderjeet Singh
<!--html code-->
<input type="checkbox" name="correct" value="1">Option 1
<input type="checkbox" name="correct" value="2">Option 2
<input type="checkbox" name="correct" value="3">Option 3
<input type="checkbox" name="correct" value="4">Option 4
//php code in function called on form submit
public function addOptions(Request $request)
{
$option = array('1' => 0,'2'=>0,'3'=>0,'4'=>0 );
$option[$request->correct] = 1;
return $option;
}
回答by Mandip Darji
try below code
试试下面的代码
$myresult = array();
if(!isset($_POST['status_1'])){
$myresult['status_1'] = 0;
}
if(!isset($_POST['status_2'])){
$myresult['status_2'] = 0;
}
if(!isset($_POST['status_3'])){
$myresult['status_3'] = 0;
}
echo "<pre>";
print_r($myresult);
echo "</pre>";
exit;
回答by M.Athish krishna
Try this one:
试试这个：
for ($i = 1; $i<=3; $i++) {
$_POST["status_$i"] = isset($_POST["status_$i"]) ? $_POST["status_$i"] : 0; // 0 if not set
}
var_dump($_POST);
回答by tom
Assuming we are using checkboxes with zeros or ones...
假设我们使用带有零或一的复选框......
Using a hidden checkbox with a zero value is just a work-around. Another work around would be to add 0 to the value when receiving the post or get.
使用具有零值的隐藏复选框只是一种解决方法。另一种解决方法是在接收帖子或获取时将 0 添加到值中。
Example:
例子：
$chkbx1 = $_POST['chckbx1']; $chkbx1 += 0;
$chkbx1 = $_POST['chckbx1']; $chkbx1 += 0;
This takes a NULL value an turns it into a zero, but if the value is one, as in its checked, then the value stays the same.
这需要一个 NULL 值并将其变成零，但如果该值为 1，如在其检查中，则该值保持不变。
The real issue here isn't inventing a work-around. Its understanding why this is happening. Older versions of mySQL takes null values and converts them into a zero. In newer versions, you must disable strict mode and then a work-around is not needed.
这里真正的问题不是发明一种变通方法。它理解为什么会发生这种情况。旧版本的 mySQL 接受空值并将它们转换为零。在较新的版本中，您必须禁用严格模式，然后就不需要解决方法了。
