Send multiple values with checkbox - php

Question

I have a form and this form contains this table:
<?php foreach($resultTable as $key => $value)
{
?>
<table>
<tr>
<td><input type = "checkbox" name="idPriv[]" id="idPriv" onclick="evaluateIT(this)" data-related-item="adminPanelShow" value ="<?php echo $value["id"]?>" />
<input name="rowID[]" id="rowID[]" class="adminPanel" hidden="hidden" type="text" value="<?php echo $value["id"]?>"/></td>
<td><input type="text" name="userName[]" id="userName" class="adminPanel" value="<?php echo $value["userName"]?>"/></td>
<td><input name="firstName[]" type="text" id="firstName" class="adminPanel" value="<?php echo $value["firstName"]?>"/></td>
</tr>
<?php } ?>
</table>
When I'm selecting the wanted checkboxes and submitting the form, I want to use only the checkboxes that I checked. That means, the idPriv[] array returns only the checkboxes that was pressed, BUT the other arrays (userName[], firstName[]) send all of the data for all the rows.
How do I extract the data from those arrays only (and disregard the rows that wasn't checked)?

Answer 1

To check if the checkboxes are checked, parse them as such:
foreach($resultTable as $key => $value)
{
if($value==="on")
{
// checked checkbox has a value of "on"
// triple = sign means value is exactly "on"
}
}

Answer 2

Connect each userName, firstName field with checkbox value:
foreach($resultTable as $key => $value)
{?>
<table>
<tr>
<td><input type = "checkbox" name="idPriv[]" id="idPriv" onclick="evaluateIT(this)" data-related-item="adminPanelShow" value ="<?php echo $value["id"]?>" />
<input name="rowID[]" id="rowID[]" class="adminPanel" hidden="hidden" type="text" value="<?php echo $value["id"]?>"/></td>
<td><input type="text" name="userName[<?php echo $value["id"]?>]" id="userName" class="adminPanel" value="<?php echo $value["userName"]?>"/></td>
^--- here
<td><input name="firstName[<?php echo $value["id"]?>]" type="text" id="firstName" class="adminPanel" value="<?php echo $value["firstName"]?>"/></td>
^--- here
</tr>
}
</table>
After that in your script you can do something like that:
foreach ($_POST[`idPriv`] as $id) {
$firstName = $_POST['firstName'][$id];
$userName = $_POST['userName'][$id];
// ...
}