Keep checkboxes in array checked on form submit - php

Question

I have a list of checkboxes created by a while loop but when the form is submitted the checkboxes are cleared. I have tried to use the unique id of the value in the record by putting it in a hidden field and then using it in an if query before marking the checkbox as checked but it does nothing
<?php
while($row = mysqli_fetch_array($result)){
$posted = $row['auditID'];
?>
<tr class="hover">
<td width="180"><? echo $row['auditName']; ?>
<input type="hidden" name="audit_id_confirm" value="<? echo $row['auditID'];?>">
</td>
<td width="33"><input type="checkbox" name="audit_selected[]"
value="<? echo $row['auditID'];?>"
<?php if($_POST['audit_id_confirm'] == $posted){ echo "checked"; }?>>
</td>
</tr>
<?php
}
?>

Answer 1

I sorted it by checking id=f the id number was in the arrays that had been posted.
<?php
$selected = $_POST['audit_selected'];
while($row = mysqli_fetch_array($result)){
$audit = $row['auditID'];
if(in_array($audit, $selected)) {
$check="checked='checked'";
}else{
$check = '';
} ?>
<tr class="hover">
<td width="180">
<?php echo $row['auditName'].' '.$num_audited; ?></td><td width="33"> <input type="checkbox" name="audit_selected[]" value="<?php echo $row['auditID'];?>" <?php echo $check; ?> >
</td>
</tr>
<?php }
?>

Answer 2

<?php if($_POST['audit_id_confirm'] == $posted){ echo "checked"; }?>>
Replace above line with this:
<?php if($_POST['audit_id_confirm'] == $posted){ echo "checked='checked'"; }?>>
You are not properly providing checked attribute to the Html entity.

Answer 3

One of the information you need to store in the table, is the state of the checkbox.
So, you can create a new column in your table, call it "checkboxstate".
Now inside your code use the following code to insert the checkbox:
<input type="checkbox" name="<?php echo($posted); ?>">
Thus far we have created several checkboxes whom names are the same as $posted, in other words each checkbox will have the name of its row's "$posted" value.
Now the only thing that is left is submitting the form and storing the checkbox info, which will return either TRUE or FALSE, and we will save that in our table, in the "checkboxstate" column.
So now in our table we will have a bunch of rows with several columns, one of the columns will be "checkboxstate" whom value will be either TRUE or FALSE.
At this point we have pretty much solved the problem, all that is left is to insert a simple if to either show a checked checkbox or an unchecked one.
<?php
while($row = mysqli_fetch_array($result)){
$posted = $row['auditID'];
$cbs = $row['checkboxstate'];
?>
<tr class="hover">
<td width="180"><? echo $row['auditName']; ?></td>
<td width="33">
<?php if($cbs == "true") echo "<input type='checkbox' name='$posted' checked='checked'>"; else echo "<input type='checkbox' name='$posted'>";
</td>
</tr>
<?php
}
?>