mktime error

I am new to php coding and have created a calendar. When I add a new event, I get the following error, though teh new event is added to the calendar.

Warning: mktime() expects parameter 6 to be long, string given in C:\wamp\www\Project 3\SimpleCalendar\view.php on line 21

Here is my code - with line 21 marked:


<?php
session_start();
require("config.php");

if(isset($_SESSION['LOGGEDIN']) == FALSE) {
header("Location: " . $config_basedir);
}

function short_event($name) {
$final = "";
$final = (substr($name, 0, 12) . "...");
return $final;
}

require("header.php");
if(isset($_GET['error'])) {
echo "<script>newEvent('" . $_GET['eventdate'] . "', 1)</script>";
}

$cols = 7;
$weekday = date("w", mktime(0, 0, 0, $month, 1, $year)); // line 21
$numrows = ceil(($numdays + $weekday) / $cols);
echo "<br />";
echo "<table class='cal' cellspacing=0 cellpadding=5 border=1>";
echo "<tr>";
echo "<th class='cal'>Sunday</th>";
echo "<th class='cal'>Monday</th>";
echo "<th class='cal'>Tuesday</th>";
echo "<th class='cal'>Wednesday</th>";
echo "<th class='cal'>Thursday</th>";
echo "<th class='cal'>Friday</th>";
echo "<th class='cal'>Saturday</th>";
echo "</tr>";
$counter = 1;
$newcounter = 1;

echo "<tr>";
$daysleft = 6 - $weekday--;
for($f=0;$f<=$weekday;$f++) {
echo "<td class='cal_date' width='110' height='10'>";
echo "</td>";
}

for($f=0;$f<=$daysleft;$f++) {
echo "<td class='cal_date' width='100' height='10'>";
$display = date("jS", mktime(0, 0, 0, $month, $counter, $year));
$todayday = date("d");
$todaymonth = date("n");
$todayyear = date("Y");
if($counter == $todayday AND $month == $todaymonth AND
$year == $todayyear) {
echo "<strong>TODAY " . $display . "</strong>";
}
else {
echo $display;
}
echo "</td>";
$counter++;
}
echo "</tr>";

echo "<tr>";
for($f=0;$f<=$weekday;$f++) {
echo "<td class='cal' width='110' height='10'>";
if($newcounter <= $numdays) {
}
echo "</td>";
}

for($f=0;$f<=$daysleft;$f++) {
echo "<td class='cal' width='110' height='40'>";
$date = $year . "-" . $month . "-" . $newcounter;
echo "<a class='cal' href='#' onclick=\"newEvent('" . $date . "')\"></a>";
$eventsql = "SELECT * FROM events WHERE date = '" . $date . "';";
$eventres = mysql_query($eventsql);
while($eventrow = mysql_fetch_assoc($eventres)) {
echo "<a class='deleteevent' href='delete.php?id=" . $eventrow['id'] . "' onclick=\"return confirm('Are you sure you want to delete `" . $eventrow['name'] ."`?');\">X</a>";
echo "<a class='event' href='#' onclick='getEvent(" . $eventrow['id'] . ")'>" . short_event($eventrow['name']) . "</a><br />";
}
echo "</td>";
$newcounter++;
}
echo "</tr>";

for($i=1;$i<=($numrows-1);$i++) {
echo "<tr>";
for($a=0;$a<=($cols-1);$a++) {
echo "<td class='cal_date' width='110' height='10'>";
$display = date("jS", mktime(0, 0, 0, $month, $counter,
$year));
$todayday = date("d");
$todaymonth = date("n");
$todayyear = date("Y");
if($counter == $todayday AND $month == $todaymonth AND
$year == $todayyear) {
echo "<strong>TODAY " . $display . "</strong>";
}
else {
echo $display;
}
echo "</td>";

$counter++;
}
echo "</tr>";
echo "<tr>";
for($aa=1;$aa<=$cols;$aa++) {
echo "<td class='cal' width='110' height='40'>";
if($newcounter <= $numdays) {
$date = $year . "-" . $month . "-" . $newcounter;
echo "<a class='cal' href='#' onclick=\"newEvent('" . $date . "')\"></a>";
$eventsql = "SELECT * FROM events WHERE date = '" . $date . "';";
$eventres = mysql_query($eventsql);
while($eventrow = mysql_fetch_assoc($eventres)) {
echo "<a class='deleteevent' href='delete.php?id=" . $eventrow['id'] . "' onclick=\"return confirm('Are you sure
you want to delete `" . $eventrow['name'] ."`?');\">X</a>";
echo "<a class='event' href='#' onclick='getEvent(" . $eventrow['id'] . ")'>" . short_event($eventrow['name']) . "</a><br />";
}
}
echo "</td>";
$newcounter++;
}
echo "</tr>";
}

echo "</table>";
require("footer.php");
?>


Can anyone tell me is causing the error and how to fix it?

Thanks - SueBee710

Try a 4 digit year

Thanks. The problem was IE (I use version 9). My code runs in Foxfire, Chrome, Safari, and Opera without a hitch!

Can someone please tell me how to mark my thread as Resolved? I cannot figure out how to do that.
Thank you.

You can modify the first post and change the title.
That won't resolve your problem though. Browser's won't interfere with server processing code, so your issue lies elsewhere.

Where have you defined $month and $year for this block:

$weekday = date("w", mktime(0, 0, 0, $month, 1, $year)); // line 21

?

Thread resolved

Thank you.