Cannot black out previous dates in my calendar - PHP
<p>I am using a calendar in which i am having trouble making the previous dates unavailable. At the moment my calendar ha links for each date and when you click a date it shows the value on another page. However i need all make all the dates that have already passed unavailable. I know it is something to do with the if statement near the end of the code but i can't figure it out. Here is my code</p>

<pre><code>&lt;?php
$monthNames = Array("January", "February", "March", "April", "May", "June", "July", 
"August", "September", "October", "November", "December");
?&gt;
&lt;?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;
}
?&gt;&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
&lt;title&gt;Hook Up&lt;/title&gt;
&lt;/head&gt;
&lt;style type="text/css"&gt;
        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;
        }
&lt;/style&gt;
&lt;script type="text/javascript"&gt;
function eventWindow(url) {
        event_popupWin = window.open(url, 'event',
        'resizable=yes, scrollbars=yes, toolbar=no, width=400, height=400);
        event_popupWin.opener = self;
}
&lt;/script&gt;
&lt;body&gt;
&lt;h1&gt;Select a Night Out&lt;/h1&gt;
&lt;table width="200"&gt;
&lt;tr align="center"&gt;
&lt;td bgcolor="#999999" style="color:#FFFFFF"&gt;
&lt;table width="100%" border="0" cellspacing="0" cellpadding="0"&gt;
&lt;tr&gt;
&lt;td width="50%" align="left"&gt;  &lt;a href="&lt;?php echo $_SERVER["PHP_SELF"] . "?month=".                     $prev_month . "&amp;year=" . $prev_year; ?&gt;" style="color:#FFFFFF"&gt;Previous&lt;/a&gt;&lt;/td&gt;
&lt;td width="50%" align="right"&gt;&lt;a href="&lt;?php echo $_SERVER["PHP_SELF"] . "?month=".  $next_month . "&amp;year=" . $next_year; ?&gt;" style="color:#FFFFFF"&gt;Next&lt;/a&gt;  &lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td align="center"&gt;
&lt;table width="100%" border="0" cellpadding="2" cellspacing="2"&gt;
&lt;tr align="center"&gt;
&lt;td colspan="7" bgcolor="#999999" style="color:#FFFFFF"&gt;&lt;strong&gt;&lt;?php echo    $monthNames[$cMonth-1].' '.$cYear; ?&gt;&lt;/strong&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
&lt;td align="center" bgcolor="#999999" style="color:#FFFFFF"&gt;&lt;strong&gt;S&lt;/strong&gt;&lt;/td&gt;
&lt;td align="center" bgcolor="#999999" style="color:#FFFFFF"&gt;&lt;strong&gt;M&lt;/strong&gt;&lt;/td&gt;
&lt;td align="center" bgcolor="#999999" style="color:#FFFFFF"&gt;&lt;strong&gt;T&lt;/strong&gt;&lt;/td&gt;
&lt;td align="center" bgcolor="#999999" style="color:#FFFFFF"&gt;&lt;strong&gt;W&lt;/strong&gt;&lt;/td&gt;
&lt;td align="center" bgcolor="#999999" style="color:#FFFFFF"&gt;&lt;strong&gt;T&lt;/strong&gt;&lt;/td&gt;
&lt;td align="center" bgcolor="#999999" style="color:#FFFFFF"&gt;&lt;strong&gt;F&lt;/strong&gt;&lt;/td&gt;
&lt;td align="center" bgcolor="#999999" style="color:#FFFFFF"&gt;&lt;strong&gt;S&lt;/strong&gt;&lt;/td&gt;
&lt;/tr&gt;
&lt;?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; $i&lt;($maxday+$startday); $i++) {
if(($i % 7) == 0 ){
echo "&lt;tr&gt;";
}
if($i &lt; $startday){
echo ("&lt;td class='cell cell_txt'&gt; &lt;/td&gt;");
} else {
if (($i - $startday + 1) == $today &amp;&amp; $currentmonth == $cMonth){
echo ("&lt;td class='cell_today cell_txt'&gt;".($i-$startday+ 1)."&lt;/td&gt;");
} else {
echo ("&lt;td class='cell cell_txt'&gt;&lt;a href=\"hook.php?day=".($i - $startday +   1)."&amp;amp;month=".$cMonth."&amp;amp;year=".$cYear."\"&gt;".($i - $startday + 1)."&lt;/a&gt;&lt;/td&gt;");
}
}
if(($i % 7) == 6 ) {
echo "&lt;/tr&gt;\n";
}
}
?&gt;
&lt;/table&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/body&gt;
    &lt;/html&gt; 
</code></pre>

<p>If anyone can help it would be greatly appreciated. Cheers</p>
