一個簡單實現的日歷，我不知道這段代碼實現的方法有沒有問題，沒有參考前輩，等你理解我的爛代碼之後，再欣賞一下別人的優秀代碼，會更有幫助
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf8" />
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<style>
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#calendardiv,#calendar{width:252px;}
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#cal_title{height:33px;line-height:33px;text-align:center;overflow:hidden;}
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#cal_title strong{font-weight:bold;font-size:14px; }
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#cal_title a{font-weight:bold;font-size:14px;text-decoration:none;}
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#calendar{border-collapse:collapse;}
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#calendar td{
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text-align:center;
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width:35px;
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height:20px;
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line-height:20px;
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background-color:#efefef;
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border-bottom:1px solid #fff;
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border-right:1px solid #fff;
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}
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#calendar .even td{background-color:#e6e6e6;}
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#calendar td .current{display:block;background-color:#f60;color:#fff;}
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#calendar .current{background-color:#f60!important;color:#fff;}
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#week td{color:#fff;background-color:#373737;}
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</style>
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</head>
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<body>
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<?php
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$date = isset($_GET['d']) ? intval($_GET['d']) : '';
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if($date)
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{
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$y = substr($date,0,4);
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$m = substr($date,4,2);
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$cur = mktime(0,0,0,$m,1,$y);
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}
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else
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{
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$cur = mktime();
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}
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list($year,$month,$day) = explode('-',date('Y-m-d',$cur));//年月日
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$p = date('Ym',strtotime('last months',$cur));//前一月
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$n = date('Ym',strtotime('next months',$cur));//後一月
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$t = date('t',$cur); //當月多少天
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$s = date('w',mktime(0,0,0,$month,1,$year)); //前補空白
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$e = 6-(date('w',mktime(0,0,0,$month,$t,$year)));//後補空白
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?>
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<div id="calendardiv">
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<div id="cal_title"><a href="?d=<?=$p?>" title="上一月">«</a> <strong><?=$year?>年<?=$month?>月</strong> <a href="?d=<?=$n?>"title="下一月">»</a></div>
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<table id="calendar">
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<tr id="week"><td>日</td><td>一</td><td>二</td><td>三</td><td>四</td><td>五</td><td>六</td></tr>
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<?php
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echo '<tr class="even">';
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for($i=0;$i<$s;$i++)
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{
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echo '<td> </td>';
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}
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for($d=1;$d<=$t;$d++)
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{
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$current=$d==$day?'class="current"':'';//當前樣式
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$r = ($d+$s)%7;//換行
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echo "<td $current >$d</td>";
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if($r==0)
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{
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echo '</tr>';
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echo '<tr class="even">';
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}
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}
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for($i=0;$i<$e;$i++)
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{
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echo '<td> </td>';
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}
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?>
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</tr></table></div>
