trmtsy/gist:3979047

## gistfile1.php
<!DOCTYPE HTML>
<html>
<head>
  <meta charset="utf-8" />
</head>
<body>
<?php

$strDate[0] = "2012-10-28";
$strDate[1] = "2012-10-29";
$strDate[2] = "2012-10-30";
$strDate[3] = "2012-10-31";
$strDate[4] = "2012-11-01";
$strDate[5] = "2012-11-02";
$strDate[6] = "2012-11-03";

foreach($strDate as $value) {

  echo $value;
  $week = japanWeek($value, "-");
  echo "：".$week."<br/>";
}

/**
 * 2012-10-30 や 2012/10/30 の日付文字列とデリミタを渡して
 * 日本語の曜日を返す
 *
 * @param String $date
 * @param String $delimitar
 * @return 曜日 <string>
 */
function japanWeek($date, $delimitar) {

  $week = array("日", "月", "火", "水", "木", "金", "土");

  list($year, $month, $day) = explode($delimitar, $date);

  $timeStamp = mktime(0, 0, 0, $month, $day, $year);
  $weekNumber = date('w', $timeStamp);

  return $week[$weekNumber];
}
?>
</body>
</html>
<!-- 結果
2012-10-28：日
2012-10-29：月
2012-10-30：火
2012-10-31：水
2012-11-01：木
2012-11-02：金
2012-11-03：土
-->
	<!DOCTYPE HTML>
	<html>
	<head>
	<meta charset="utf-8" />
	</head>
	<body>
	<?php

	$strDate[0] = "2012-10-28";
	$strDate[1] = "2012-10-29";
	$strDate[2] = "2012-10-30";
	$strDate[3] = "2012-10-31";
	$strDate[4] = "2012-11-01";
	$strDate[5] = "2012-11-02";
	$strDate[6] = "2012-11-03";

	foreach($strDate as $value) {

	echo $value;
	$week = japanWeek($value, "-");
	echo "：".$week."<br/>";
	}

	/**
	* 2012-10-30 や 2012/10/30 の日付文字列とデリミタを渡して
	* 日本語の曜日を返す
	*
	* @param String $date
	* @param String $delimitar
	* @return 曜日 <string>
	*/
	function japanWeek($date, $delimitar) {

	$week = array("日", "月", "火", "水", "木", "金", "土");

	list($year, $month, $day) = explode($delimitar, $date);

	$timeStamp = mktime(0, 0, 0, $month, $day, $year);
	$weekNumber = date('w', $timeStamp);

	return $week[$weekNumber];
	}
	?>
	</body>
	</html>
	<!-- 結果
	2012-10-28：日
	2012-10-29：月
	2012-10-30：火
	2012-10-31：水
	2012-11-01：木
	2012-11-02：金
	2012-11-03：土
	-->