Untitled

<?php
session_start();
require('connection.php');
?>
<!DOCTYPE html>
<html>
    <head>
        <title>Peon</title>
        <link rel="stylesheet" href="assets/css/style.css">
        <link rel="stylesheet" href="assets/css/bootstrap.min.css" />
    </head>
    <body>
<?php
if(ISSET($_SESSION['id'])) {
    $id = $_SESSION['id'];
    $fetch = "SELECT * FROM user_info WHERE id='$id';";
    $query = mysql_query($fetch);
    if(!$query) {
        echo mysql_error();
    } else {
        $array=mysql_fetch_array($query);
?>
    <h1 style="text-align:center">Welcom to you profile page <span><?php echo $array['name']; ?></span></h1>
<?php
    }
}
?>
    <div id="peon">
    <form name="attendence_form" action="" method="POST">
        <table class="table table-bordered">
            <tr>
                <th>Teacher Name</th>
                <th>Subject</th>
                <th>Class</th>
                <th>Room #</th>
                <th>Attendence</th>
                <th>Submit</th>
            </tr>
<?php
$fetch = "SELECT * FROM period;";
$query = mysql_query($fetch);
if(!$query) {
    echo mysql_error();
} else {
    WHILE($array = mysql_fetch_array($query)) {
?>
            <tr>
                <td><input type="text" value="<?php echo $array['teacher_name']; ?>" class="form-control" name="t_name[]" /></td>
                <td><input type="text" value="<?php echo $array['subject']; ?>" class="form-control" name="subject[]" /></td>
                <td><input type="text" value="<?php echo $array['class']; ?>" class="form-control" name="class[]" /></td>
                <td><input type="text" value="<?php echo $array['room']; ?>" class="form-control" name="room[]" /></td>
                <td>
                    <select name="attendence[]" class="form-control">
                        <option value="Present">Present</option>
                        <option value="Absent">Absent</option>
                    </select>
                </td>
                <td><button type="submit" name="btn_sub" class="btn btn-default">Submit</button></td>
            </tr>
<?php
    }
}
?>
        </table>
    </form>
    </div>
<?php
    if (ISSET($_POST['btn_sub'])) {
        $count = $_POST['t_name'];
        for ($i = 0; $i < $count; $i++) {
            $teacher = $_POST['t_name'][$i];
            $subject = $_POST['subject'][$i];
            $class=$_POST['class'][$i];
            $room=$_POST['room'][$i];
            $attendence=$_POST['attendence'][$i];
            $insert="INSERT INTO atendence (teacher_name,subject,class,room,attendence) VALUE ('$teacher','$subject','$class','$room','$attendence');";
            $quer=mysql_query($insert);
            if(!$query) {
                echo mysql_error();
            }
        }
        header('location: yourphp.php');
    }
?>
</body>
</html>