一个非常简单的月历的实现，给点建议

[荆棘谷-部落-王亚楠]

看思路是否有问题，还有其它更好的算法吧？
谢谢!

	function get_calendar($year='',$month='')
	{
		$year = ($year == '' ? date('Y') : $year);
		$month = ($month == '' ? date('n') : $month);
		
		//获取当前月第一天的星期数
		$start_weekday = date('w',strtotime($year.'-'.$month.'-1'));
		//获取当前月的总天数
		$days = date('t',strtotime($year.'-'.$month));
		
		//数组，存放 7X6 个元素
		$m = array();
		
		//假设为 2009-5
		/* 是把月历搞成如下形式:
		日 | 一 | 二 | 三 | 四 | 五 | 六
		______________________________
		   |    |   |    |    | 1 | 2
		 3 | 4  | 6 | 7  | 8  | 9 | 10
		 ...
		 31|    |   |    |    |   | 
		 
		*/
		for($s = 0; $s < $start_weekday; $s++)
		{
			$m[$s] = '';
		}
		
		$m[$start_weekday] = 1;	
		$j = $start_weekday + 1;
		
		for($s = 2; $s <= $days; $s++)
		{
			$m[$j] = date('w',strtotime($year.'-'.$month.'-'.$s));
			$j++;
		}
		for($s = $j; $s < 42; $s++)
		{
			$m[$s] = '';
		}
		
		/*
			形成如下数组(	经过调用后，print_r() 以下，
						$arr = get_calendar();
						echo '<pre>';
						print_r($arr);
						echo '</pre>';)：
			Array
			(
				[0] => Array
					(
						[0] => 
						[1] => 
						[2] => 
						[3] => 
						[4] => 
						[5] => 1
						[6] => 6
					)
			
				[1] => Array
					(
						[0] => 0
						[1] => 1
						[2] => 2
						[3] => 3
						[4] => 4
						[5] => 5
						[6] => 6
					)
			
				[2] => Array
					(
						[0] => 0
						[1] => 1
						[2] => 2
						[3] => 3
						[4] => 4
						[5] => 5
						[6] => 6
					)
			
				[3] => Array
					(
						[0] => 0
						[1] => 1
						[2] => 2
						[3] => 3
						[4] => 4
						[5] => 5
						[6] => 6
					)
			
				[4] => Array
					(
						[0] => 0
						[1] => 1
						[2] => 2
						[3] => 3
						[4] => 4
						[5] => 5
						[6] => 6
					)
			
				[5] => Array
					(
						[0] => 0
						[1] => 
						[2] => 
						[3] => 
						[4] => 
						[5] => 
						[6] => 
					)
			)

		*/
		return array_chunk($m,7);
	}
	
	//实际使用代码：
	$arr = get_calendar($year,$month);
	$num = 1;
	
	$cot = count($arr);
	echo '<table>';
	for($i = 0; $i < $cot; $i++)
	{
		for($j = 0; $j < 7; $j++)
		{
			echo ($j == 0 ? '<tr">' : '').'<td">';
			echo ($arr[$i][$j] == ''? '' : '<a href="?url=">'.($num++).'</a>');
			echo '</td>'.($j == 6 ? '</tr>' : '');
		}
	}
	echo '</table>';

[荆棘谷-部落-王亚楠]

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实际效果