数组仅存储值为1（不为0）的复选框[重复]

Question

This question already has an answer here:

• PHP: Possible to automatically get all POSTed data And Multiple checkbox unchecked? 1 answer

I have checkboxes which change value using JavaScript and I want to store values of all checkboxes in a PHP array. But if the user changes the value of one checkbox to "0", the array created has only 2 values (1,1) instead of (1,0,1).

HTML

<input type="checkbox" name="cbox1[]" checked="checked" value="1" class="chbo">
<input type="checkbox" name="cbox1[]" checked="checked" value="1" class="chbo">
<input type="checkbox" name="cbox1[]" checked="checked" value="1" class="chbo">

PHP

$wer=$_POST['cbox1'];
echo implode(",",$wer);

Jquery

$(document).on('click', '.chbo', function() {
this.value ^= 1;
console.log(this.value);
});

</div>

Answer 1

Only successful (checked) controls are submitted. You need to add a hidden input with the default value before the checkbox. Notice you need to hard code the indexes so that the hidden default matches the checkbox value:

<input type="hidden"   name="cbox1[0]" value="0" class="chbo">
<input type="checkbox" name="cbox1[0]" value="1" class="chbo" checked="checked">
<input type="hidden"   name="cbox1[1]" value="0" class="chbo">
<input type="checkbox" name="cbox1[1]" value="1" class="chbo" checked="checked">

So if not checked, only the hidden cbox1[0] with value 0 will be submitted. If checked, then cbox1[0] with value 1 will overwrite the hidden input.

You won't need the JavaScript now because you can change the checkbox to value 0 but if it is not checked it won't be submitted.