function confirm()
{
    $student_id = $_REQUEST['student_id'];
    $tutor_id = $_REQUEST['tutor_id'];
    $match_id = $_REQUEST['match_id'];
    $match_info = match_info($match_id);
    if (!$match_id) {
        return;
    }
    if ($student_id) {
        $request_info = request_info($match_info['request_id']);
        if ($student_id == $request_info['student_id']) {
            mark_match_student_acknowledged($match_id);
        }
    } else {
        if ($tutor_id) {
            if ($tutor_id == $match_info['tutor_id']) {
                mark_match_tutor_acknowledged($match_id);
            }
        }
    }
}
<?php

$match_id = $_REQUEST["match_id"];
$match_info = match_info($match_id);
$request_info = request_info($match_info['request_id']);
$student_info = student_info($request_info['student_id']);
$tutor_info = tutor_info($match_info['tutor_id']);
?>

<div class=title>Edit Tutoring Match</div>

<form method="post">
<input type="hidden" name="action" value="<?php 
echo $_REQUEST["set_action"];
?>
">
<input type="hidden" name="page" value="edit_match">
<input type="hidden" name="match_id" value="<?php 
echo $match_id;
?>
">
<table>
    <tr>
        <td align="right">Student:</td>
        <td><a href="?set_action=edit_student&page=edit_student&student_id=<?php 
echo $student_info['id'];
?>
"><?php 
echo $student_info['name'];
?>
</a></td>