submit ID using multiple checkboxes in PHP HTML Mysql - php

Question

I am using multiple HTML checkboxes to submit student attendance. The checkbox once clicked submit '1' and if not checked, will submit '0'. I am able to submit '1' when checked but cant submit '0'. Below is my code:
<?php
$subcheck = (isset($_POST['subcheck'])) ? 1 : 0;
$date = date("Y/m/d");
foreach ( $student as $attendance ) {
echo "<tr>";
echo "<td>$attendance->id</td>";
echo "<td>$attendance->name</td>";
echo "<td>
$attendance->classroom_id
</td>";?>
<input type="hidden" name="date[]" value="<?php echo $date;?>" />
<td><input type="checkbox" name="status[]" value="<?php echo $attendance->id;?>"></td>
<td><input type="text" name="reason[]" ></td>
<?php
}
?>
<tr>
<td colspan="2" align="center"><input type="submit" value="Save" name="submit"></td>

Answer 1

This might give you some ideas:
<?php
$subcheck = (isset($_POST['subcheck'])) ? 1 : 0;
$date = date("Y/m/d");
$out = '<table id="tblAttendance"><thead><th>ID</th><th>Name</th><th>Room</th><th>Status</th><th>Reason</th></thead><tbody>';
foreach ( $student as $attendance ) {
$out .= '<tr>';
$out .= '<td>' .$attendance->id. '<input type="hidden" name="studentID[]" value="' .$attendance->id. '"></td>';
$out .= '<td>' .$attendance->name. '<input type="hidden" name="name[]" value="' .$attendance->name. '"></td>';
$out .= '<td>' .$attendance->classroom_id. '<input type="hidden" name="classroomID[]" value="' .$attendance->classroom_id. '"></td>';
$out .= '<td><input type="checkbox" name="status[]" value="yes"></td>';
$out .= '<td><input type="text" name="reason[]" ></td>';
$out .= '</tr>';
}
$out .= '<tr><td colspan="2" align="center"><input type="submit" value="Save" name="submit"></td></tr>';
$out .= '</tbody></table>';
$out .= '<input type="hidden" name="date" value="' .$date. '" />';
echo $out;
?>
Since you are using a type="submit" button, I presume you have this inside a form construct?
Recall how checkboxes work in HTML forms: if the box is checked, the value received on the PHP side will be the value="yes" value. In other words, the variable $_POST['status'][n] will have the value yes.
HOWEVER, if the checkbox is not set, then $_POST['status'][n] will not be set.
Reference:
http://www.html-form-guide.com/php-form/php-form-checkbox.html