function fill_out_sch($user_num, $start, $end)
{
    $conect = connect_acc();
    $date_time_s = explode(' ', $start);
    $date_time_e = explode(' ', $end);
    $date_end = $date_time_e[0];
    $date = $date_time_s[0];
    $specific_val = "S";
    while ($date <= $date_end) {
        if ($date == $date_time_s[0]) {
            $lim_s = $date . " " . $date_time_s[1];
            $lim_e = inc_day($date) . " 23:59:59";
        } elseif ($date == $date_end) {
            $lim_s = $date . " 00:00:00";
            $lim_e = inc_day($date) . " " . $date_time_e[1];
        } else {
            $lim_s = $date . " 00:00:00";
            $lim_e = inc_day($date) . " 23:59:59";
        }
        if ($result = $conect->query("SELECT `Name`,`Start`,`End` FROM `Schedule` WHERE `User_#`='{$user_num}' AND `TYPE`='D' AND `Start`>='{$lim_s}' AND `End`<='{$lim_e}' ORDER BY 'Start' ASC")) {
            if ($result->num_rows == 0) {
                $y_m_d = explode('-', $date);
                $weekday = dayoftheweek($y_m_d[0], $y_m_d[1], $y_m_d[2]);
                $result = $conect->query("SELECT `Name`,`Start`,`End` FROM `Schedule` WHERE `User_#`='{$user_num}' AND `TYPE`='{$weekday}' ORDER BY 'Start' ASC");
            }
            if ($result->num_rows > 0) {
                while ($row = $result->fetch_assoc()) {
                    $ds_date_time_s = explode(' ', $row["Start"]);
                    $ds_date_time_e = explode(' ', $row["End"]);
                    $specific_val = $specific_val . $row["Name"] . "/" . $date . " " . $ds_date_time_s[1] . "/" . $date . " " . $ds_date_time_e[1] . "//";
                }
            }
        }
        $specific_val = $specific_val . "||";
        $date = inc_day($date);
    }
    disconnect($conect);
    return $specific_val;
}
<?php

include 'connect.php';
$conect = connect_acc();
$name = $_POST['name'];
$value = intval($_POST['value']);
$time_start = $_POST['time_start'] . ":00";
$time_end = $_POST['time_end'] . ":00";
$day = $_POST['day'];
$buff_start = $_POST['buff_start'];
$buff_end = $_POST['buff_end'];
$username = intval($_POST['username']);
if ($conect->query("INSERT INTO `event` (`EVENT_NAME`, `PRIORTY`, `TIME_BEGIN`, `TIME_END`, `DAY`, `BUFF_BEGIN`, `BUFF_END`, `USER_#`) VALUES ('{$name}','{$value}','{$time_start}','{$time_end}','{$day}','{$buff_start}','{$buff_end}','{$username}');")) {
    echo "{$name} recorded succesfully.";
} else {
    die('Error: Failed to Connect');
}
disconnect($conect);
function algorithm_s($user_num)
{
    $conect = connect_acc();
    $array = array();
    if ($result = $conect->query("SELECT * FROM `Event` WHERE `USER_#`='{$user_num}' AND (`DAY`='D' OR `DAY`='C') ORDER BY 'TIME_BEGIN' ASC")) {
        if ($result->num_rows > 0) {
            $early_date = null;
            while ($row = $result->fetch_assoc()) {
                if ($early_date < $row['TIME_BEGIN']) {
                    $date_time_s = explode(' ', $row['TIME_BEGIN']);
                    $date_time_e = explode(' ', $row['TIME_END']);
                    $date_start = $date_time_s[0];
                    $date_end = $date_time_e[0];
                    while ($date_start <= $date_end) {
                        $date_com = explode('-', $date_start);
                        $day_week = dayoftheweek($date_com[0], $date_com[1], $date_com[2]);
                        $early_date = $date_start . " 00:00:00";
                        $end_date = $date_start . " 23:59:59";
                        $sleep_set = false;
                        if ($result2 = $conect->query("SELECT *  FROM `Event` WHERE `USER_#`='{$user_num}' AND (`DAY`='{$day_week}' OR `DAY`='C' OR `DAY`='D' OR (`TIME_BEGIN`<='{$end_date}' AND `TIME_END`>='{$early_date}')) ORDER BY 'PRIORTY' ASC")) {
                            if ($result2->num_rows > 0) {
                                $list = new linked_day();
                                while ($row2 = $result2->fetch_assoc()) {
                                    if ($date_end . " 23:59:59" < $row2['TIME_END']) {
                                        $date_time_e = explode(' ', $row2['TIME_END']);
                                        $date_end = $date_time_e[0];
                                    }
                                    $date_time_b = explode(' ', $row2['TIME_BEGIN']);
                                    $date_time_e = explode(' ', $row2['TIME_END']);
                                    $time_b = $date_time_b[1];
                                    $time_e = $date_time_e[1];
                                    if ($row2['DAY'] != "C") {
                                        if ($early_date > row2['TIME_BEGIN'] && $end_date < $row2['TIME_END']) {
                                            $list->add($row2['EVENT_NAME'], "00:00:00", "23:59:59");
                                        } elseif ($early_date < $row2['TIME_BEGIN']) {
                                            $list->add($row2['EVENT_NAME'], "00:00:00", $time_e);
                                            $list->add($row2['EVENT_NAME'], $time_e, $row2['BUFF_END']);
                                        } elseif ($end_date < $row2['TIME_END']) {
                                            $list->add($row2['EVENT_NAME'], $row2['BUFF_BEGIN'], $time_b);
                                            $list->add($row2['EVENT_NAME'], $time_b, "23:59:59");
                                        } else {
                                            $list->add($row2['EVENT_NAME'], $row2['BUFF_BEGIN'], $time_b);
                                            $list->add($row2['EVENT_NAME'], $time_b, $time_e);
                                            $list->add($row2['EVENT_NAME'], $time_e, $row2['BUFF_END']);
                                        }
                                    } else {
                                        if ($sleep_set == false) {
                                            $sleep_set = true;
                                            $list->sleep_insert();
                                        }
                                        switch ($row2['EVENT_NAME']) {
                                            case 0:
                                                $study_time = "03:00:00";
                                                break;
                                            case 3:
                                                $study_time = "01:30:00";
                                                break;
                                            case 6:
                                                $study_time = "01:00:00";
                                                break;
                                            default:
                                                $study_time = "00:30:00";
                                                break;
                                        }
                                        $list->fill_time($study_time, $row2['EVENT_NAME']);
                                    }
                                }
                                if ($sleep_set == false) {
                                    $sleep_set = true;
                                    $list->sleep_insert();
                                }
                                $list->excer_insert();
                                write($list, $date_start, 'D', $user_num);
                            }
                        }
                        $date_start = inc_day($date_start);
                    }
                }
            }
        }
    }
    disconnect($conect);
}
function get_user($User_num)
{
    $conect = connect_acc();
    if ($result = $conect->query("SELECT `Username` FROM `account` WHERE `USER_#`='{$User_num}'")) {
        if ($result->num_rows > 0) {
            $row = $result->fetch_assoc();
            $username = $row["Username"];
        } else {
            die("Unknown");
        }
    } else {
        die("failed to connect to user database");
    }
    disconnect($conect);
    return $username;
}