计算有多少复选框被选中 php/html

counting how many checkbox are checked php/html

提问by user2732815

Hi I am new with php and I was wondering how am i able to count how many 'checkbox'are checked once I click on submit. For example:

嗨，我是 php 新手，我想知道'checkbox'一旦我点击提交，我怎么能计算出检查了多少。例如：

<input type = "checkbox" value = "box" name = "checkbox1"/>
<input type = "checkbox" value = "box" name = "checkbox2"/>
<input type = "checkbox" value = "box" name = "checkbox3"/>

回答by Gautam3164

Give the checkboxes names as array like

将复选框名称指定为数组

<input type = "checkbox" value = "box" name = "checkbox[]"/>

And after submittry like

并在提交后尝试像

$checked_arr = $_POST['checkbox'];
$count = count($checked_arr);
echo "There are ".$count." checkboxe(s) are checked";

Note :And based on the method that your form submit using...whether it is $_GETor $_POSTyou need to use $_POST['checkbox']for POSTmethod and $_GET['checkbox']for the GETmethod.

注：基于该方法，你的表单提交使用......无论是$_GET还是$_POST你需要使用$_POST['checkbox']的POST方法$_GET['checkbox']的GET方法。

回答by Your Common Sense

You have to rename the names and add values

您必须重命名名称并添加值

<input type = "checkbox" value = "box" name = "checkbox[]" value="1"/>
<input type = "checkbox" value = "box" name = "checkbox[]" value="2"/>
<input type = "checkbox" value = "box" name = "checkbox[]" value="3"/>

This way you will know not only number (which you don't actually need)

这样你不仅会知道数字（你实际上并不需要）

echo count($_POST['checkbox']);

but also have the actual selected values:

但也有实际选择的值：

foreach($_POST['checkbox'] as $val)
{
    echo "$val<br>\n";
}

回答by Naveen Kumar Alonekar

<input type = "checkbox" value = "box" name = "checkbox"/>
<input type = "checkbox" value = "box" name = "checkbox"/>
<input type = "checkbox" value = "box" name = "checkbox"/>

to check which boxes have been checked simply traverse through the chk[] array like this:

要检查哪些框已被选中，只需像这样遍历 chk[] 数组：

$chk_array = $_POST['checkbox'];

for($chk_array as $chk_key => $chk_value)
{
print 'Checkbox Id:'. $chk_key . ' Value:'. $chk_value .'is
checked';
}

回答by Teneff

You can set names for the checkboxes as an array:

您可以将复选框的名称设置为数组：

<input type = "checkbox" value = "box" name = "checkbox[1]"/>
<input type = "checkbox" value = "box" name = "checkbox[2]"/>
<input type = "checkbox" value = "box" name = "checkbox[3]"/>

and then you will have an array in PHP ($_POST['checkbox']):

然后你将在 PHP ( $_POST['checkbox']) 中有一个数组：

echo count( $_POST['checkbox'] ); // this will give you the count

otherwise you can iterate over each one of them and increment a variable:

否则，您可以遍历它们中的每一个并增加一个变量：

$counter = 0;
foreach( array('checkbox1', 'checkbox2', 'checkbox3') as $name ) {
  if( isset( $_POST[ $name ] ) {
     $counter++
  }
}
echo $counter;

回答by Niraj Chauhan

Using jQuery you can achieve it:

使用 jQuery 你可以实现它：

$("input:checkbox:checked").length

$("input:checkbox:checked").length

This will return the number of checboxes checked.

这将返回选中的复选框数。

And in php you'll need to pass it as an array.

在 php 中，您需要将其作为数组传递。

echo count($_POST['checkbox']);

echo count($_POST['checkbox']);

回答by Praind

$checkedBoxes = 0;

// Depending on the action, you set in the form, you have to either choose $_GET or $_POST
if(isset($_GET["checkbox1"])){
  $checkedBoxes++;
}
if(isset($_GET["checkbox2"])){
  $checkedBoxes++;
}
if(isset($_GET["checkbox3"])){
  $checkedBoxes++;
}

回答by nbar

All boxes that are checked will be in the Request when u click submit. In your case, if checkbox1 is checked u get: "checkbox1=box"

当您单击提交时，所有选中的框都将在请求中。在你的情况下，如果 checkbox1 被选中，你会得到：“checkbox1=box”

If you use GETas the method it will look like: http://yoururl.com/yourcode.php?checkbox1=boxand u can access it with $_GET['checkbox1']

如果您使用GET作为方法，它将如下所示：http: //yoururl.com/yourcode.php?checkbox1 = box并且您可以使用 $_GET['checkbox1'] 访问它

If you use POSTas the method you can access it with $_POST['checkbox1']

如果您使用POST作为方法，您可以使用 $_POST['checkbox1'] 访问它

You can also check if the box is checked (and in the Request data) with isset($_POST['checkbox1'])

您还可以使用 isset($_POST['checkbox1']) 检查该框是否被选中（以及在请求数据中）