閉じタグ無しでいいなら

<?php function q($w,$i=1,$x="Y-m"){global$v;return date($x,$i?mktime(0,0,0,$w,
$i,$v):strtotime($w));}list($v,$w,$d)=explode("-",q("$_GET[y]-1",0,"Y-m-t"));
echo$l="<a href=?y=",q($w-1),"><</a>$v-$w$l",q($w+1),">></a> $l>now</a><table>"
;for($i=-6-$f=q("$v-$w-1",0,"w");$i<32;){echo"<td>",($i<1-$f?q($w,$i,"D"):($i<1
||$i>$d?"":$i)),($f+$i++)%7?"":"<tr>";}