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listPage.php
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<?php
session_start();
$newDates = get_contents('newDates.json');
$appointments = get_contents('bookings.json') ? get_contents('bookings.json') : [] ;
if (isset($_SESSION['date']) && empty(checkAppoint($appointments)) && !isAdmin()){
echo 'You have already selected a date and time, so you are being redirected to the booking page';
header('Refresh: 1; url=booking.php?date=' . $_SESSION['date'] . '&time=' . $_SESSION['time']);
exit;
}
function checkAppoint($appointments){
$alreadyBooked = [];
if (isset($_SESSION['loggeduser'])){
foreach ($appointments as $appoint){
$appointdate = key($appoint);
foreach ($appoint as $time){
if ($time[key($time)] === $_SESSION['loggeduser']['email']){
$alreadyBooked = [$appointdate, key($time)];
}
}
}
}
return $alreadyBooked;
}
function countAppoints($appointments, $date){
$count = 0;
foreach ($appointments as $appoint){
$appointdate = key($appoint);
if ($appointdate === $date){
$count += 1;
}
}
return $count;
}
function checkAppointTime($appointments, $date, $time){
$flag = false;
foreach ($appointments as $appoint){
$appointdate = key($appoint);
if ($appointdate === $date){
foreach($appoint as $aptime){
$appointTime = key($aptime);
if ($appointTime === $time){
$flag = true;
}
}
}
}
return $flag;
}
function isAdmin(){
return !empty($_SESSION['loggeduser']['email']) && ($_SESSION['loggeduser']['email'] === '[email protected]' && $_SESSION['loggeduser']['password']);
}
function setColor($slots, $limit){
return $slots < $limit ? 'background-color:green;' : 'background-color:rgb(255, 38, 30);';
}
function setNewDateColor($slots, $newDate, $date){
if (!empty($newDate)){
if ($date === $newDate[0]){
return setColor($slots, $newDate[1]);
}
}else {
return '';
}
}
function get_contents($filename){
$raw_contents = file_get_contents($filename);
return json_decode($raw_contents, TRUE);
}
function put_contents($filename, $contents){
file_put_contents($filename, json_encode($contents));
}
function prefixI($i){
return $i <= 9 ? '0'. $i : $i;
}
$newDate = [];
if (isset($_SESSION['newDate'])){
$newDate = $_SESSION['newDate'];
unset($_SESSION['newDate']);
$newDates[] = $newDate;
put_contents('newDates.json', $newDates);
}
function isNewDate($newDates, $prospectDate){
foreach ($newDates as $date){
if ($date[0] === $prospectDate){
return $date;
}
}
return [];
}
if ($_GET){
$date = $_GET['date'];
$time = $_GET['time'];
$new_appointments = [];
foreach ($appointments as $appoint){
if (key($appoint) === $date){
foreach ($appoint as $aptime){
if (key($aptime) === $time){
$new_appointments[] = [];
}else {
$new_appointments[] = [
key($appoint) => $aptime
];
}
}
}else {
$new_appointments[] = $appoint;
}
}
put_contents('bookings.json', $new_appointments);
header('Location: listPage.php');
exit;
}
$weekDays = ['Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa', 'Su'];
?>
<!DOCTYPE html>
<html>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<head>
<link rel="stylesheet" href="https://www.w3schools.com/w3css/3/w3.css">
</head>
<style>
table, td, th {
width: 580px;
height: 50px;
border: 1px black solid;
border-collapse: collapse;
}
td { text-align: center; }
.center{
margin-left: auto;
margin-right: auto;
}
.navbar{
color:#fff!important;
background-color:#4CAF50;
width:100%;
overflow:hidden
}
a {
color: dodgerblue;
}
.navbar a {
float: left;
color: #f2f2f2;
text-align: center;
padding: 14px 16px;
text-decoration: none;
font-size: 17px;
}
.navbar a:hover {
background-color: #ddd;
color: black;
}
.navbar h2{
padding:8px 16px;
float:left;
width:auto;
text-align: center;
}
</style>
<body>
<nav class="navbar">
<a href="login.php">Login</a>
<a href="registration.php">Registration</a>
<?= isset($_SESSION['loggeduser']) ? '<a href=login.php?out=true style=float:right>LogOut</a>' : ''?>
<h2 style="color:blue"><?= !empty(checkAppoint($appointments)) ? 'You already have an appointment on ' . checkAppoint($appointments)[0] . ' at '. checkAppoint($appointments)[1] : ''?></h2>
</nav>
<h1>Welcome to the National Health Center's Covid Vaccinantion Page</h1>
<p>Here you would be able to find the available dates and time slots for the CoronaVirus Vaccinantion. You can also book an appointment
on an available day and time slot. But you need to register yourself first. For registration, you need to have a SSN(Social Security Number)
and a valid email address</p>
<h2 style="text-align: center">January 2021</h2>
<table class="center">
<tr>
<?php foreach ($weekDays as $day):?>
<th style="background-color:blue;"><?= $day?></th>
<?php endforeach?>
</tr>
<tr>
<?php for ($i=1; $i<=7;$i++):?>
<td style="<?= ($i % 2 === 0) ? setColor(countAppoints($appointments, '2021/01/0' . $i), 4) : setNewDateColor(countAppoints($appointments, '2021/01/0' . $i), isNewDate($newDates, '2021/01/0' . $i), ('2021/01/0' . $i)) ?>">
<?= $i?><br>
<?php if ($i % 2 === 0): ?>
<a href="listPage.php?date=<?= !empty(checkAppoint($appointments)) ? checkAppoint($appointments)[0] : '' ?>&time=<?=!empty(checkAppoint($appointments)) ? checkAppoint($appointments)[1] : '' ?>"><?= !empty(checkAppoint($appointments)) && '2021/01/0' . $i === checkAppoint($appointments)[0] ? 'Cancel this appointment' : '' ?></a>
<?= countAppoints($appointments, '2021/01/0' . $i) < 4 ? '<div>' : '<div hidden>' ?>
<a href="booking.php?date=2021/01/0<?=$i?>& time=10:00"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/0' . $i, '10:00') ? '' : '10:00') ?></a>
<a href="booking.php?date=2021/01/0<?=$i?>& time=10:30"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/0' . $i, '10:30') ? '' : '10:30') ?></a>
<a href="booking.php?date=2021/01/0<?=$i?>& time=14:00"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/0' . $i, '14:00') ? '' : '14:00') ?></a>
<a href="booking.php?date=2021/01/0<?=$i?>& time=14:30"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/0' . $i, '14:30') ? '' : '14:30') ?></a>
</div>
<?= (isAdmin() && countAppoints($appointments, '2021/01/0' . $i) >= 4) ? "<a href=booking.php?date=2021/01/0" . $i . "&time=14:30". '> Check appointments </a>' : '<a hidden></a>' ?>
<p>Slots : <?= countAppoints($appointments, '2021/01/0' . $i) . '/4' ?></p>
<?php elseif (!empty($newDates) && !empty(isNewDate($newDates, '2021/01/0' . $i))): ?>
<?php $newAddedDate = isNewDate($newDates, '2021/01/0' . $i) ?>
<a href="listPage.php?date=<?= !empty(checkAppoint($appointments)) ? checkAppoint($appointments)[0] : '' ?>&time=<?=!empty(checkAppoint($appointments)) ? checkAppoint($appointments)[1] : '' ?>"><?= !empty(checkAppoint($appointments)) && '2021/01/0' . $i === checkAppoint($appointments)[0] ? 'Cancel this appointment' : '' ?></a>
<?= countAppoints($appointments, '2021/01/0' . $i) < $newAddedDate[1] ? '<div>' : '<div hidden>' ?>
<?php $var = ['10', '00'] ?>
<?php for ($j = 1; $j<= $newAddedDate[1]; $j++): ?>
<a href="booking.php?date=2021/01/0<?=$i?>& time=<?= $var[0] . ':' . $var[1] ?>"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/0' . $i, $var[0] . ':' . $var[1]) ? '' : $var[0] . ':' . $var[1]) ?></a>
<?php $var = [$var[1] === '00' ? $var[0] : (string)(intval($var[0]) + 4) , $var[1] === '00' ? '30' : '00' ] ?>
<?php endfor ?>
</div>
<?= (isAdmin() && countAppoints($appointments, '2021/01/0' . $i) >= $newAddedDate[1]) ? "<a href=booking.php?date=2021/01/0" . $i . "&time=" . $var[0] . ":" . $var[1] . '> Check appointments </a>' : '<a hidden></a>' ?>
<p>Slots : <?= countAppoints($appointments, '2021/01/0' . $i) . '/' . $newAddedDate[1] ?></p>
<?php endif?>
</td>
<?php endfor?>
</tr>
<tr>
<?php for ($i=8; $i<=14;$i++):?>
<td style="<?= ($i % 2 !== 0) ? setColor(countAppoints($appointments, '2021/01/' . prefixI($i)), 4) : setNewDateColor(countAppoints($appointments, '2021/01/' . prefixI($i)), isNewDate($newDates, '2021/01/' . prefixI($i)), ('2021/01/' . prefixI($i))) ?>">
<?= $i?><br>
<?php if ($i % 2 !== 0): ?>
<a href="listPage.php?date=<?= !empty(checkAppoint($appointments)) ? checkAppoint($appointments)[0] : '' ?>&time=<?=!empty(checkAppoint($appointments)) ? checkAppoint($appointments)[1] : '' ?>"><?= !empty(checkAppoint($appointments)) && '2021/01/' . prefixI($i) === checkAppoint($appointments)[0] ? 'Cancel this appointment' : '' ?></a>
<?= countAppoints($appointments, '2021/01/' . prefixI($i)) < 4 ? '<div>' : '<div hidden>' ?>
<a href="booking.php?date=2021/01/<?=prefixI($i)?>& time=10:00"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/0' . prefixI($i), '10:00') ? '' : '10:00') ?></a>
<a href="booking.php?date=2021/01/<?=prefixI($i)?>& time=10:30"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/0' . prefixI($i), '10:30') ? '' : '10:30') ?></a>
<a href="booking.php?date=2021/01/<?=prefixI($i)?>& time=14:00"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/0' . prefixI($i), '14:00') ? '' : '14:00') ?></a>
<a href="booking.php?date=2021/01/<?=prefixI($i)?>& time=14:30"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/0' . prefixI($i), '14:30') ? '' : '14:30') ?></a>
</div>
<?= (isAdmin() && countAppoints($appointments, '2021/01/' . prefixI($i)) >= 4) ? "<a href=booking.php?date=2021/01/" . prefixI($i) . "&time=14:30". '> Check appointments </a>' : '<a hidden></a>' ?>
<p>Slots : <?= countAppoints($appointments, '2021/01/' . prefixI($i)) . '/4' ?></p>
<?php elseif (!empty($newDates) && !empty(isNewDate($newDates, '2021/01/' . prefixI($i)))): ?>
<?php $newAddedDate = isNewDate($newDates, '2021/01/' . prefixI($i)) ?>
<a href="listPage.php?date=<?= !empty(checkAppoint($appointments)) ? checkAppoint($appointments)[0] : '' ?>&time=<?=!empty(checkAppoint($appointments)) ? checkAppoint($appointments)[1] : '' ?>"><?= !empty(checkAppoint($appointments)) && '2021/01/' . prefixI($i) === checkAppoint($appointments)[0] ? 'Cancel this appointment' : '' ?></a>
<?= countAppoints($appointments, '2021/01/' . prefixI($i)) < $newAddedDate[1] ? '<div>' : '<div hidden>' ?>
<?php $var = ['10', '00'] ?>
<?php for ($j = 1; $j<= $newAddedDate[1]; $j++): ?>
<a href="booking.php?date=2021/01/<?=prefixI($i)?>& time=<?= $var[0] . ':' . $var[1] ?>"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/' . prefixI($i), $var[0] . ':' . $var[1]) ? '' : $var[0] . ':' . $var[1])?></a>
<?php $var = [$var[1] === '00' ? $var[0] : (string)(intval($var[0]) + 4) , $var[1] === '00' ? '30' : '00' ] ?>
<?php endfor ?>
</div>
<?= (isAdmin() && countAppoints($appointments, '2021/01/' . prefixI($i)) >= $newAddedDate[1]) ? "<a href=booking.php?date=2021/01/" . prefixI($i) . "&time=" . $var[0] . ":" . $var[1] . '> Check appointments </a>' : '<a hidden></a>' ?>
<p>Slots : <?= countAppoints($appointments, '2021/01/' . prefixI($i)) . '/' . $newAddedDate[1] ?></p>
<?php endif?>
</td>
<?php endfor?>
</tr>
<tr>
<?php for ($i=15; $i<=21;$i++):?>
<td style="<?= ($i % 2 === 0) ? setColor(countAppoints($appointments, '2021/01/' . $i), 4) : setNewDateColor(countAppoints($appointments, '2021/01/' . $i), isNewDate($newDates, '2021/01/' . $i), ('2021/01/' . $i)) ?>">
<?= $i?><br>
<?php if ($i % 2 === 0): ?>
<a href="listPage.php?date=<?= !empty(checkAppoint($appointments)) ? checkAppoint($appointments)[0] : '' ?>&time=<?=!empty(checkAppoint($appointments)) ? checkAppoint($appointments)[1] : '' ?>"><?= !empty(checkAppoint($appointments)) && '2021/01/' . $i === checkAppoint($appointments)[0] ? 'Cancel this appointment' : '' ?></a>
<?= countAppoints($appointments, '2021/01/' . $i) < 4 ? '<div>' : '<div hidden>' ?>
<a href="booking.php?date=2021/01/<?=$i?>& time=10:00"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/' . $i, '10:00') ? '' : '10:00') ?></a>
<a href="booking.php?date=2021/01/<?=$i?>& time=10:30"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/' . $i, '10:30') ? '' : '10:30') ?></a>
<a href="booking.php?date=2021/01/<?=$i?>& time=14:00"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/' . $i, '14:00') ? '' : '14:00') ?></a>
<a href="booking.php?date=2021/01/<?=$i?>& time=14:30"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/' . $i, '14:30') ? '' : '14:30') ?></a>
</div>
<?= (isAdmin() && countAppoints($appointments, '2021/01/' . $i) >= 4) ? "<a href=booking.php?date=2021/01/" . $i . "&time=14:30". '> Check appointments </a>' : '<a hidden></a>' ?>
<p>Slots : <?= countAppoints($appointments, '2021/01/' . $i) . '/4' ?></p>
<?php elseif (!empty($newDates) && !empty(isNewDate($newDates, '2021/01/' . $i))): ?>
<?php $newAddedDate = isNewDate($newDates, '2021/01/' . $i) ?>
<a href="listPage.php?date=<?= !empty(checkAppoint($appointments)) ? checkAppoint($appointments)[0] : '' ?>&time=<?=!empty(checkAppoint($appointments)) ? checkAppoint($appointments)[1] : '' ?>"><?= !empty(checkAppoint($appointments)) && '2021/01/' . $i === checkAppoint($appointments)[0] ? 'Cancel this appointment' : '' ?></a>
<?= countAppoints($appointments, '2021/01/' . $i) < $newAddedDate[1] ? '<div>' : '<div hidden>' ?>
<?php $var = ['10', '00'] ?>
<?php for ($j = 1; $j<= $newAddedDate[1]; $j++): ?>
<a href="booking.php?date=2021/01/<?=$i?>& time=<?= $var[0] . ':' . $var[1] ?>"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/' . $i, $var[0] . ':' . $var[1]) ? '' : $var[0] . ':' . $var[1]) ?></a>
<?php $var = [$var[1] === '00' ? $var[0] : (string)(intval($var[0]) + 4) , $var[1] === '00' ? '30' : '00' ] ?>
<?php endfor ?>
</div>
<?= (isAdmin() && countAppoints($appointments, '2021/01/' . $i) >= $newAddedDate[1]) ? "<a href=booking.php?date=2021/01/" . $i . "&time=" . $var[0] . ":" . $var[1] . '> Check appointments </a>' : '<a hidden></a>' ?>
<p>Slots : <?= countAppoints($appointments, '2021/01/' . $i) . '/' . $newAddedDate[1] ?></p>
<?php endif?>
</td>
<?php endfor?>
</tr>
<tr>
<?php for ($i=22; $i<=28;$i++):?>
<td style="<?= ($i % 2 !== 0) ? setColor(countAppoints($appointments, '2021/01/' . $i), 4) : setNewDateColor(countAppoints($appointments, '2021/01/' . $i), isNewDate($newDates, '2021/01/' . $i), ('2021/01/' . $i)) ?>">
<?= $i?><br>
<?php if ($i % 2 !== 0): ?>
<a href="listPage.php?date=<?= !empty(checkAppoint($appointments)) ? checkAppoint($appointments)[0] : '' ?>&time=<?=!empty(checkAppoint($appointments)) ? checkAppoint($appointments)[1] : '' ?>"><?= !empty(checkAppoint($appointments)) && '2021/01/' . $i === checkAppoint($appointments)[0] ? 'Cancel this appointment' : '' ?></a>
<?= countAppoints($appointments, '2021/01/' . $i) < 4 ? '<div>' : '<div hidden>' ?>
<a href="booking.php?date=2021/01/<?=$i?>& time=10:00"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/' . $i, '10:00') ? '' : '10:00') ?></a>
<a href="booking.php?date=2021/01/<?=$i?>& time=10:30"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/' . $i, '10:30') ? '' : '10:30') ?></a>
<a href="booking.php?date=2021/01/<?=$i?>& time=14:00"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/' . $i, '14:00') ? '' : '14:00') ?></a>
<a href="booking.php?date=2021/01/<?=$i?>& time=14:30"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/' . $i, '14:30') ? '' : '14:30') ?></a>
</div>
<?= (isAdmin() && countAppoints($appointments, '2021/01/' . $i) >= 4) ? "<a href=booking.php?date=2021/01/" . $i . "&time=14:30". '> Check appointments </a>' : '<a hidden></a>' ?>
<p>Slots : <?= countAppoints($appointments, '2021/01/' . $i) . '/4' ?></p>
<?php elseif (!empty($newDates) && !empty(isNewDate($newDates, '2021/01/' . $i))): ?>
<?php $newAddedDate = isNewDate($newDates, '2021/01/' . $i) ?>
<a href="listPage.php?date=<?= !empty(checkAppoint($appointments)) ? checkAppoint($appointments)[0] : '' ?>&time=<?=!empty(checkAppoint($appointments)) ? checkAppoint($appointments)[1] : '' ?>"><?= !empty(checkAppoint($appointments)) && '2021/01/' . $i === checkAppoint($appointments)[0] ? 'Cancel this appointment' : '' ?></a>
<?= countAppoints($appointments, '2021/01/' . $i) < $newAddedDate[1] ? '<div>' : '<div hidden>' ?>
<?php $var = ['10', '00'] ?>
<?php for ($j = 1; $j<= $newAddedDate[1]; $j++): ?>
<a href="booking.php?date=2021/01/<?=$i?>& time=<?= $var[0] . ':' . $var[1] ?>"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/' . $i, $var[0] . ':' . $var[1]) ? '' : $var[0] . ':' . $var[1]) ?></a>
<?php $var = [$var[1] === '00' ? $var[0] : (string)(intval($var[0]) + 4) , $var[1] === '00' ? '30' : '00' ] ?>
<?php endfor ?>
</div>
<?= (isAdmin() && countAppoints($appointments, '2021/01/' . $i) >= $newAddedDate[1]) ? "<a href=booking.php?date=2021/01/" . $i . "&time=" . $var[0] . ":" . $var[1] . '> Check appointments </a>' : '<a hidden></a>' ?>
<p>Slots : <?= countAppoints($appointments, '2021/01/' . $i) . '/' . $newAddedDate[1] ?></p>
<?php endif?>
</td>
<?php endfor?>
</tr>
<tr>
<?php for ($i=29; $i<=31;$i++):?>
<td style="<?= ($i % 2 === 0) ? setColor(countAppoints($appointments, '2021/01/' . $i), 4) : setNewDateColor(countAppoints($appointments, '2021/01/' . $i), isNewDate($newDates, '2021/01/' . $i), ('2021/01/' . $i)) ?>">
<?= $i?><br>
<?php if ($i % 2 === 0): ?>
<a href="listPage.php?date=<?= !empty(checkAppoint($appointments)) ? checkAppoint($appointments)[0] : '' ?>&time=<?=!empty(checkAppoint($appointments)) ? checkAppoint($appointments)[1] : '' ?>"><?= !empty(checkAppoint($appointments)) && '2021/01/' . $i === checkAppoint($appointments)[0] ? 'Cancel this appointment' : '' ?></a>
<?= countAppoints($appointments, '2021/01/' . $i) < 4 ? '<div>' : '<div hidden>' ?>
<a href="booking.php?date=2021/01/<?=$i?>& time=10:00"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/' . $i, '10:00') ? '' : '10:00') ?></a>
<a href="booking.php?date=2021/01/<?=$i?>& time=10:30"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/' . $i, '10:30') ? '' : '10:30') ?></a>
<a href="booking.php?date=2021/01/<?=$i?>& time=14:00"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/' . $i, '14:00') ? '' : '14:00') ?></a>
<a href="booking.php?date=2021/01/<?=$i?>& time=14:30"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/' . $i, '14:30') ? '' : '14:30') ?></a>
</div>
<?= (isAdmin() && countAppoints($appointments, '2021/01/' . $i) >= 4) ? "<a href=booking.php?date=2021/01/" . $i . "&time=14:30". '> Check appointments </a>' : '<a hidden></a>' ?>
<p>Slots : <?= countAppoints($appointments, '2021/01/' . $i) . '/4' ?></p>
<?php elseif (!empty($newDates) && !empty(isNewDate($newDates, '2021/01/' . $i))): ?>
<?php $newAddedDate = isNewDate($newDates, '2021/01/' . $i) ?>
<a href="listPage.php?date=<?= !empty(checkAppoint($appointments)) ? checkAppoint($appointments)[0] : '' ?>&time=<?=!empty(checkAppoint($appointments)) ? checkAppoint($appointments)[1] : '' ?>"><?= !empty(checkAppoint($appointments)) && '2021/01/' . $i === checkAppoint($appointments)[0] ? 'Cancel this appointment' : '' ?></a>
<?= countAppoints($appointments, '2021/01/' . $i) < $newAddedDate[1] ? '<div>' : '<div hidden>' ?>
<?php $var = ['10', '00'] ?>
<?php for ($j = 1; $j<= $newAddedDate[1]; $j++): ?>
<a href="booking.php?date=2021/01/<?=$i?>& time=<?= $var[0] . ':' . $var[1] ?>"><?= !empty(checkAppoint($appointments)) ? '' : (checkAppointTime($appointments, '2021/01/' . $i, $var[0] . ':' . $var[1]) ? '' : $var[0] . ':' . $var[1]) ?></a>
<?php $var = [$var[1] === '00' ? $var[0] : (string)(intval($var[0]) + 4) , $var[1] === '00' ? '30' : '00' ] ?>
<?php endfor ?>
</div>
<?= (isAdmin() && countAppoints($appointments, '2021/01/' . $i) >= $newAddedDate[1]) ? "<a href=booking.php?date=2021/01/" . $i . "&time=" . $var[0] . ":" . $var[1] . '> Check appointments </a>' : '<a hidden></a>' ?>
<p>Slots : <?= countAppoints($appointments, '2021/01/' . $i) . '/' . $newAddedDate[1] ?></p>
<?php endif?>
</td>
<?php endfor?>
</tr>
</table><br>
<nav class="navbar">
<?= isAdmin() ? '<a href="addDate.php">Post a new date</a>' : '' ?>
<a href="dec.php" id="left">Previous Month</a>
<a href="feb.php" id="right">Next Month</a>
</nav>
</body>
</html>