博客日历问题的PHP实现
本人想实现博客日历上记录有发表日志的（也就是标志，比如我这个月25写了博客，在日历上的25号上就会有一个下划线什么的）记录。就像PHPCHINA个人博客记录类似！

下面是实现的代码,忘记从哪里扒下来的了,极大的可能是Discuz!的个人空间里面
现在贴出来给大家共享

function calendarnew($starttime = 0) {
    global $db, $tablepre, $timestamp, $site_timeoffset, $site_dateformat, $curtime;

    $starttime = $starttime ? $starttime : $timestamp;
    $curtime = gmdate($site_dateformat, $starttime + $timeoffset * 3600);

    $pendtime = $starttime - (gmdate('j', $starttime + $timeoffset * 3600) - 1) * 86400 - ($starttime + $timeoffset * 3600) % 86400;
    $pstarttime = $pendtime - gmdate('t', $pendtime + $timeoffset * 3600 - 1) * 86400;

    $nstarttime = $pendtime + gmdate('t', $pendtime + $timeoffset * 3600 + 1) * 86400;
    $nendtime = $nstarttime + gmdate('t', $nstarttime + $timeoffset * 3600 + 1) * 86400;

    list($skip, $dim) = explode('-', gmdate('w-t', $pendtime + $timeoffset * 3600 + 1));
    $rows = ceil(($skip + $dim) / 7);

    $blogs = array();
    $query = $db->query("SELECT dateline FROM {$tablepre}vitaitems WHERE dateline BETWEEN '$pendtime' AND '$nstarttime'");
    while($blog = $db->fetch_array($query)) {
        $day = gmdate('j', $blog['dateline'] + $timeoffset * 3600);
        !isset($blogs[$day]) ? $blogs[$day] = array('num' => 1, 'dateline' => $blog['dateline'] - $blog['dateline'] % 86400) : $blogs[$day]['num']++;
    }
    $cal = '';
    for($row = 0; $row < $rows; $row++) {
        $cal .= '<tr align="center" class="smalltxt">';
        for($col = 0; $col < 7; $col++) {
            $cur = $row * 7 + $col - $skip + 1;
            $curtd = $row * 7 + $col < $skip || $cur > $dim ? ' ' : $cur;
            if(!isset($blogs[$cur])) {
                $cal .= '<td>'.$curtd.'</td>';
            } else {
                $cal .= '<td><a href="blog.php?uid='.$uid.'&starttime='.$blogs[$cur]['dateline'].'&endtime='.($blogs[$cur]['dateline'] + 86400).'" title=" '.$blogs[$cur]['num'].' "><b>'.$cur.'</b></a></td>';
            }
        }
        $cal .= '';
    }
    return $cal;
}