我正在为我的网站创建一个活动日历，我使用了this tutorial和this other one，以及未知幽灵的youtube教程。
然而，当我进入一个事件时，它会成功但不会变成蓝色。
我是否犯了一个错误/拼写错误，可以解释为什么它不变蓝？
此外，一旦添加了一个事件，它就会显示在底部，但如果我刷新页面，事件会自动再次添加。
每个月都要度过，并意识到二月没有出现。这是为什么？
这是我的代码：
calendar.php
<?php
include("functions.php")
?>
<html>
<head>
<title>Event Calendar</title>
<script>
function goLastMonth(month, year){
if(month == 1) {
--year;
month = 13;
}
--month
var monthstring = ""+month+"";
var monthlength = monthstring.length;
if(monthlength <=1){
monthstring = "0"+monthstring;
}
document.location.href = "<?php $_SERVER['PHP_SELF'];?>?month="+monthstring+"&year="+year;
}
function goNextMonth(month, year){
if(month == 12) {
++year;
month = 0;
}
++month
var monthstring = ""+month+"";
var monthlength = monthstring.length;
if(monthlength <=1){
monthstring = "0"+monthstring;
}
document.location.href = "<?php $_SERVER['PHP_SELF'];?>?month="+monthstring+"&year="+year;
}
</script>
<style>
.today{
background-color: #00ff00;
}
.event{
background-color: #0000ff;
}
</style>
</head>
<body>
<?php
//get current date or specific month and year
if (isset($_GET['day'])){
$day = $_GET['day'];
} else {
$day = date("d");
}
if(isset($_GET['month'])){
$month = $_GET['month'];
} else {
$month = date("m");
}
if(isset($_GET['year'])){
$year = $_GET['year'];
}else{
$year = date("Y");
}
//get date data for display such as month name
$currentTimeStamp = strtotime( "$day-$month-$year");
$monthName = date("F", $currentTimeStamp);
//get the number of days in the current month and year
$numDays = date("t", $currentTimeStamp);
//keep track of the number of cell created
$counter = 0;
?>
<?php
if(isset($_GET['add'])) {
$name = $_POST['Event_Name'];
$details = $_POST['Details'];
$date = $day."/".$month."/".$year;
$location = $_POST['Location'];
$staffrq = $_POST['Staff_Required'];
$cadetsrq = $_POST['Cadets_Required'];
//insert into database
$sqlinsert = "INSERT INTO Event_Detail (Event_Name, Details, Date, Location, Staff_Required, Cadets_Required) VALUES
('".$name."', '".$details."', '".$date."', '".$location."', '".$staffrq."','".$cadetsrq."')";
$resultinsert = mysql_query($sqlinsert);
if($resultinsert) {
echo "Event Successfully Added...";
}else{
echo "Event Failed to be Added...";
}
}
?>
<table border="1px">
<tr>
<td align="center">
<input style='width:80px;' type='button' value='<'name='previousbutton' onclick ="goLastMonth(<?php echo $month.','.$year?>)">
</td>
<td align="center" colspan="5"><?php echo $monthName." ".$year; ?></td>
<td align="center">
<input style='width:80px;' type='button' value='>'name='nextbutton' onclick ="goNextMonth(<?php echo $month.','.$year?>)">
</td>
</tr>
<tr>
<td align="center" width='80px'>Monday</td>
<td align="center" width='80px'>Tuesday</td>
<td align="center" width='80px'>Wednesday</td>
<td align="center" width='80px'>Thursday</td>
<td align="center" width='80px'>Friday</td>
<td align="center" width='80px'>Saturday</td>
<td align="center" width='80px'>Sunday</td>
</tr>
<tr align="center">
<?php
for($i = 1; $i < $numDays+1; $i++, $counter++){
$timeStamp = strtotime("$i-$month-$year");
//create empty cell until first day of the month
if($i == 1) {
//0=sun, 1=mon, 2=tue, ...
$firstDay = date("w", $timeStamp);
//if sunday change the firstDay to 7
if($firstDay == 0)
$firstDay = 7;
//decrement firstDay by 1
$firstDay--;
for($j = 0; $j < $firstDay; $j++, $counter++) {
echo "<td> </td>";
}
}
//create new row
if($counter % 7 == 0) {
echo"</tr><tr>";
}
$monthstring = $month;
$monthlength = strlen($monthstring);
$daystring = $i;
$daylength = strlen($daystring);
if($monthlength <=1){
$monthstring = "0".$monthstring;
}
if($daylength <=1) {
$daystring = "0".$daystring;
}
$todaysDate = date("d/m/Y");
$dateToCompare = $daystring.'/'.$monthstring.'/'.$year;
//print day number
echo "<td align='center'";
if ($todaysDate == $dateToCompare) {
echo "class='today'";
}else{
$sqlCount = "SELECT * FROM Event_Detail WHERE Date='".$dateToCompare."'";
$noOfEvent = mysql_num_rows(mysql_query($sqlCount));
if($noOfEvents >=1) {
echo "class='event'";
}
}
echo "><a href='".$_SERVER['PHP_SELF']."?day=".$daystring."&month=".$monthstring."&year=".$year."&v=true'>".$i."</a></td>";
}
//fill up the leftover cells of the table
while($counter % 7 != 0) {
echo "<td> </td>";
$counter++;
}
?>
</tr>
</table>
<?php
if(isset($_GET['v'])){
echo "<a href='".$_SERVER['PHP_SELF']."?day=".$day."&month=".$month."&year=".$year."&v=true&f=true'>Add Event</a>";
if(isset($_GET['f'])){
include("eventform.php");
}
$sqlEvent = "SELECT * FROM Event_Detail WHERE Date='".$day."/".$month."/".$year."'";
$resultEvents=mysql_query($sqlEvent);
echo "<hr>";
while($events=mysql_fetch_array($resultEvents)){
echo "Event Name: ".$events['Event_Name']."<br>";
echo "Details: ".$events['Details']."<br>";
echo "Date: ".$events['Date']."<br>";
echo "Location: ".$events['Location']."<br>";
echo "Staff Required: ".$events['Staff_Required']."<br>";
echo "Cadets Required: ".$events['Cadets_Required']."<br>";
}
}
?>
</body>
</html>
eventform.php
<title>Event</title>
<form name="eventform" method="POST" action="<?php $_SERVER['PHP_SELF']; ? >?day=<?php echo $day;?>&month=<?php echo $month;?>&year=<?php echo $year;? >&v=true&add=true">
<table width="400px">
<tr>
<td width="150px">Event Name</td>
<td width="250px"><input type="text" name="Event_Name" required></td>
</tr>
<tr>
<td width="150px">Details</td>
<td width="250px"><textarea name="Details" required></textarea></td>
</tr>
<tr>
<td width='150px'>Location</td>
<td width='250px'><textarea name="Location" required></textarea></td>
</tr>
<tr>
<td width='150px'>Staff Required</td>
<td width='250px'><input type='number' name="Staff_Required" required></td>
</tr>
<tr>
<td width='150px'>Cadets Required</td>
<td width='50px'><input type='number' name="Cadets_Required" required></td>
</tr>
<tr>
<td colspan='2' align='center'><input type='submit' name='btnadd' value='Add Event'></td>
</tr>