我正在使用日历，但无法使之前的日期不可用。目前，我的日历有每个日期的链接，当您单击一个日期时，它会在另一个页面上显示该值。但是，我需要全部使所有已经过去的日期不可用。我知道这与代码末尾附近的 if 语句有关，但我无法弄清楚。这是我的代码
<?php
$monthNames = Array("January", "February", "March", "April", "May", "June", "July",
"August", "September", "October", "November", "December");
?>
<?php
$cMonth = isset($_REQUEST["month"]) ? $_REQUEST["month"] : date("n");
$cYear = isset($_REQUEST["year"]) ? $_REQUEST["year"] : date("Y");
$prev_year = $cYear;
$next_year = $cYear;
$prev_month = $cMonth-1;
$next_month = $cMonth+1;
if ($prev_month == 0 ) {
$prev_month = 12;
$prev_year = $cYear - 1;
}
if ($next_month == 13 ) {
$next_month = 1;
$next_year = $cYear + 1;
}
?><!DOCTYPE html>
<html>
<head>
<title>Hook Up</title>
</head>
<style type="text/css">
table {
border: 1px solid black;
border-collapse: collapse;
}
th {
border: 1px solid black;
padding: 6px;
font-weight: bold;
background: #ccc;
}
td {
border: 1px solid black;
padding: 6px;
vertical-align: top;
width: 100px;
}
</style>
<script type="text/javascript">
function eventWindow(url) {
event_popupWin = window.open(url, 'event',
'resizable=yes, scrollbars=yes, toolbar=no, width=400, height=400);
event_popupWin.opener = self;
}
</script>
<body>
<h1>Select a Night Out</h1>
<table width="200">
<tr align="center">
<td bgcolor="#999999" style="color:#FFFFFF">
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td width="50%" align="left"> <a href="<?php echo $_SERVER["PHP_SELF"] . "?month=". $prev_month . "&year=" . $prev_year; ?>" style="color:#FFFFFF">Previous</a></td>
<td width="50%" align="right"><a href="<?php echo $_SERVER["PHP_SELF"] . "?month=". $next_month . "&year=" . $next_year; ?>" style="color:#FFFFFF">Next</a> </td>
</tr>
</table>
</td>
</tr>
<tr>
<td align="center">
<table width="100%" border="0" cellpadding="2" cellspacing="2">
<tr align="center">
<td colspan="7" bgcolor="#999999" style="color:#FFFFFF"><strong><?php echo $monthNames[$cMonth-1].' '.$cYear; ?></strong></td>
</tr>
<tr>
<td align="center" bgcolor="#999999" style="color:#FFFFFF"><strong>S</strong></td>
<td align="center" bgcolor="#999999" style="color:#FFFFFF"><strong>M</strong></td>
<td align="center" bgcolor="#999999" style="color:#FFFFFF"><strong>T</strong></td>
<td align="center" bgcolor="#999999" style="color:#FFFFFF"><strong>W</strong></td>
<td align="center" bgcolor="#999999" style="color:#FFFFFF"><strong>T</strong></td>
<td align="center" bgcolor="#999999" style="color:#FFFFFF"><strong>F</strong></td>
<td align="center" bgcolor="#999999" style="color:#FFFFFF"><strong>S</strong></td>
</tr>
<?php
$timestamp = mktime(0,0,0,$cMonth,1,$cYear);
$maxday = date("t",$timestamp);
$thismonth = getdate ($timestamp);
$startday = $thismonth['wday'];
$today = date('j');
$currentmonth = date('n');
for ($i=0; $i<($maxday+$startday); $i++) {
if(($i % 7) == 0 ){
echo "<tr>";
}
if($i < $startday){
echo ("<td class='cell cell_txt'> </td>");
} else {
if (($i - $startday + 1) == $today && $currentmonth == $cMonth){
echo ("<td class='cell_today cell_txt'>".($i-$startday+ 1)."</td>");
} else {
echo ("<td class='cell cell_txt'><a href=\"hook.php?day=".($i - $startday + 1)."&month=".$cMonth."&year=".$cYear."\">".($i - $startday + 1)."</a></td>");
}
}
if(($i % 7) == 6 ) {
echo "</tr>\n";
}
}
?>
</table>
</td>
</tr>
</table>
</body>
</html>
如果有人可以提供帮助，将不胜感激。干杯