Form submit 2 arrays - php

Question

I am trying to make a form submit.
Form is select a task, then show several rows with checkbox and select with values 1-10
If checkbox is selected is need to add values from select into database.
this is PHP code
if(isset($_POST) && $_SERVER['REQUEST_METHOD'] = 'POST'){
if(isset($_POST['submita'])){
foreach($_POST['nota'] as $key => $value)
if (isset($_POST['boxes'])){
foreach($_POST['boxes'] as $key => $value2){
if(isset($value2)){
$nota = htmlent($_POST['nota']);
$box = htmlent($_POST['boxes']);
$task = htmlent($_POST['task']);
$db->insert(array(
"task" => $task,
"nota" => $value,
"box" => $value2,
),
"erp_notes");
}
else
{
echo 'Select';
}
}
}
}
}
HTML
<input type="checkbox" name="boxes[]" value="<?=$row['id'];?>"></input>
<?=$row['name'];?>
<select name="nota[]" >
<option value="">Select</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</option>
<option value="9">9</option>
<option value="10">10</option>
</select>
I try many time but nothing.

Answer 1

In the very first if you have = when you mean ==.
You haven't posted the entire HTML so I'll have to assume there is a submita element there that's being set. Your best bet is to do var_dump($_POST) to see what you are actually getting, and then build your code to match.
Your code is incorrect because it loops over every boxes for each nota, when what I suspect you want is to just check the checkbox that corresponds to that element.
You probably want something more like this:
if (isset($_POST['nota']))
{
for ($i = 0; $i < count($_POST['nota']); ++$i)
{
if (isset($_POST['boxes'][$i]))
$db->insert(array('task' => $task, 'nota' => $_POST['nota'][$i], 'box' => $_POST['boxes'][$i], 'erp_notes');
}
}

Answer 2

i was edited cod , but work like in comment from first answer
PHP
if(isset($_POST) && $_SERVER['REQUEST_METHOD'] == 'POST'){
if (isset($_POST['nota']))
{
for ($i = 0; $i < count($_POST['nota']); ++$i)
{
if (isset($_POST['boxes'][$i]))
$task = htmlent($_POST['task_id']);
$db->insert(array(
"nota" => $_POST['nota'][$i],
"date" => time(),
"box" => $_POST['boxes'][$i],
"task" => $task
),
"erp_note");
}
}
}
HTML
<form class="grid_12" action="" method="post" enctype="multipart/form-data">
<input type="checkbox" name="boxes[]" value="<?=$row['id'];?>"></input><?=$row['box_name'];?>
<select name="nota[]" multiple><option value="">select</option><option value="1">1</option><option value="2">2</option><option value="3">3</option><option value="4">4</option></select>
<input name="task" type="text" value="<?=$row['task_id'];?>" style="display:none;">
</form>