issue to get multiple checkbox array values Codeigniter - php

Question

Facing issue to get multiple checkbox array values in Codeignite
<div class="form-actions">
<form action="candidates/posted" name="posted" method="post">
<button class="btn btn-primary" type="submit" value="submit" name="submit">Action</button>
</div>
<table class="table table-striped table-bordered table-condensed">
<thead>
<tr>
<th class="header">#</th>
<th class="checkbox">Status</th>
<th class="yellow header headerSortDown">Roll No</th>
<th class="green header">Class Name</th>
<th class="red header">Full Name</th>
<th class="red header">Father Name</th>
<th class="red header">Sections</th>
<th class="red header">Actions</th>
</tr>
</thead>
<tbody>
<?php
foreach($candidates as $row)
{
echo '<tr>';
echo '<td>'.$row['id'].'</td>';
//echo '<td>' .'</td>';
echo '<td><input type="checkbox" class ="chkCheckBoxId" value='.$row['id'].' name="chk_id[]"/></td>';
echo '<td>'.$row['roll_no'].'</td>';
echo '<td>'.$row['class_name'].'</td>';
echo '<td>'.$row['full_name'].'</td>';
echo '<td>'.$row['father_name'].'</td>';
echo '<td>'.$row['section_name'].'</td>';
echo '<td class="crud-actions">
view & edit
delete
</td>';
echo '</tr>';
}
?>
</form>
Controller here:
public function posted()
{
if(!empty($_POST['chk_id'])) {
foreach($_POST['chk_id'] as $check) {
echo $check;
}
}
}

Answer 1

Just try like this inside foreach loop.There is conflict on using quotes.
$id = $row['id'];
echo '<td><input type="checkbox" class ="chkCheckBoxId" value="'.$id.'" name="chk_id[]"/></td>';
In codeigniter you can use $this->input->post() to get posted values.So following is a better way..
public function posted()
{
if(!empty($this->input->post('chk_id')) {
foreach($this->input->post('chk_id') as $check) {
echo $check;
}
}
}

Answer 2

Correct me on this but I believe that an unchecked checkbox does not get sent back to the server. I have always checked to see if a checkbox is checked by seeing if it is in the $_POST[] array (I tend to use method="post").
When I need an array of checkboxes, I actually give them their own names. If I am listing a group of products for users to choose, for example, I will give each checkbox a name that starts with "chk_" and then append the ID of the product. This way, during processing the data, all I have to do is loop through the $POST[] array and every object that starts with chk is a checkbox and the rest indicates which product they chose.