如何验证多重复选框状态？

I am using position absolute's validation engine for my form. I would like to check whether at least one checkbox from group is selected. In examples it is done by setting the same name attribute for group of checkboxes. I cannot name checkboxes with the same name, because I am saving their state in database with following code:

$values = array(
    'checkbox1'         => null,
    'checkbox2'         => null
);

foreach (array_intersect_key($_POST, $values) as $key => $value) {
    $values[$key] = mysql_real_escape_string($value);
}

$query_add_candidate=sprintf("INSERT INTO dbase (checkbox1, checkbox2)    VALUES    ('$values[checkbox1]', '$dates[checkbox2]')"

Now checkbox1 and checkbox2 are validated individually, beacuse they have different names. How can I check if selected is at least one of them?

Here is my HTML code:

<input class="validate[minCheckbox[1]] checkbox" type="checkbox" name="checkbox1" id="maxcheck1" value="1"/> Text1
<input class="validate[minCheckbox[1]] checkbox" type="checkbox" name="checkbox2" id="maxcheck2" value="2"/> Text2

on php ,

if(!$_POST['checkbox1'] && !$_POST['checkbox2']){
    echo 'Error check at least one';
}

but what you really want is an array, HTML,

<input type="checkbox" value="ch1" name="check[]" /> 
<input type="checkbox" value="ch2" name="check[]" />

php

<?php 
if(empty($_POST['check'])){
 echo 'Error: hey, check at least one will you!?'; 
}

?>

so this way you don't have to check all of them one by one, especially if you have loads of them on the same page.

NOTICE: You should also know, if checkbox is not ticked it will also not be set on the php $_POST superglobal, otherwise if it is ticked, it will show whatever the value="..." holds,

if its posted then its checked,

so if you have it in $_POST["checkbox_name"] then its checked, otherwise it wont be posted.

You can either add loads of code to reimplement control arrays in a poor way, or you can alter the code that builds your query so it can accept control arrays.

I would prefer the latter.