Attendance system in php

I want to take students attendance.
i had made a page attendance.php
This is coding part

[code=php]<?php
$report = mysql_query(“SELECT id, name, rollno FROM registered_members”) or die(mysql_error());
?>
<form action=”attendinsert.php” method=”post”>
<table id = “attendance” width=”567″ border=”1 bold”>
<tr>
<th width=”83″ scope=”col”>ID</th>
<th width=”83″ scope=”col”>Student Name</th>
<th width=”55″ scope=”col”>Student Roll.No</th>
<th width=”51″ scope=”col”>Attendance</th>
</tr>
<?php while(list($id, $name, $rollno) = mysql_fetch_row($report))
{
?>
<tr>
<td><?php echo $id ?></td>
<td><?php echo $name ?></td>
<td><?php echo $rollno ?></td>
<td align=”center”><?php echo ‘<input type=”hidden” name=”att[]” value=”0″/>’;?><?php echo ‘<input type=”checkbox” checked=”checked” name=”att[]” value=”1″ />’; ?></td>
<input type=”hidden” name=”rollno[]” value=”<?php echo $rollno; ?>” />
</tr>
<?php
}
echo ‘</table>’;
?>
<input type=”submit” name =”submit2″ id=”submit2″ value =”submit”></input>
</form>
[/code]

///////////////////////////////////////////////////////
And the second page is attendinsert.php
by which i want to save data in attendance table

[code=php]<?php
$att = $_POST[‘att’];
$rollno = $_POST[‘rollno’];
foreach($att as $key => $attendance) {
$at = $attendance ? ‘1’ : ‘0’;
$query = “INSERT INTO `attendance`(`rollno`,`att`) VALUES (‘”.$rollno[$key].”‘,'”.$at.”‘) “;
$result = mysql_query($query);
}
?>
[/code]

I dont know whats the error. on line

[code=php]$query = “INSERT INTO `attendance`(`rollno`,`att`) VALUES (‘”.$rollno[$key].”‘,'”.$at.”‘) “;
[/code]

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