chamilo-lms/main/extra/delete_exam.php

<?php
/* For licensing terms, see /license.txt */

require_once '../inc/global.inc.php';

$allow = api_get_configuration_value('extra');
if (empty($allow)) {
    exit;
}

api_block_anonymous_users();

$ex_user_id = isset($_GET['student_id']) ? (int) $_GET['student_id'] : 0;
$num = isset($_GET['num']) ? (int) $_GET['num'] : 0;

$table = Database::get_main_table(TABLE_STATISTIC_TRACK_E_EXERCISES);
$sql = "DELETE FROM $table WHERE exe_id = $num";
Database::query($sql);

header("location: myStudents.php?student=$ex_user_id");
exit;