関数　get_weekstartend()

2014/11/23 2014/11/25

定義ファイル :/blog/wp-includes/functions.php 2

get_weekstartend()
MySQLのdatetime値から、週の始まりと終わりを取得する

/**
 * Get the week start and end from the datetime or date string from MySQL.
 *
 * @since 0.71
 *
 * @param string     $mysqlstring   Date or datetime field type from MySQL.
 * @param int|string $start_of_week Optional. Start of the week as an integer. Default empty string.
 * @return array Keys are 'start' and 'end'.
 */
function get_weekstartend( $mysqlstring, $start_of_week = '' ) {
	// MySQL string year.
	$my = substr( $mysqlstring, 0, 4 );

	// MySQL string month.
	$mm = substr( $mysqlstring, 8, 2 );

	// MySQL string day.
	$md = substr( $mysqlstring, 5, 2 );

	// The timestamp for MySQL string day.
	$day = mktime( 0, 0, 0, $md, $mm, $my );

	// The day of the week from the timestamp.
	$weekday = date( 'w', $day );

	if ( !is_numeric($start_of_week) )
		$start_of_week = get_option( 'start_of_week' );

	if ( $weekday < $start_of_week )
		$weekday += 7;

	// The most recent week start day on or before $day.
	$start = $day - DAY_IN_SECONDS * ( $weekday - $start_of_week );

	// $start + 7 days - 1 second.
	$end = $start + 7 * DAY_IN_SECONDS - 1;
	return compact( 'start', 'end' );
}

/**

* Get the week start and end from the datetime or date string from MySQL.

* @since 0.71

* @param string $mysqlstring Date or datetime field type from MySQL.

* @param int|string $start_of_week Optional. Start of the week as an integer. Default empty string.

* @return array Keys are 'start' and 'end'.

function get_weekstartend( $mysqlstring, $start_of_week = '' ) {

// MySQL string year.

$my = substr( $mysqlstring, 0, 4 );

// MySQL string month.

$mm = substr( $mysqlstring, 8, 2 );

// MySQL string day.

$md = substr( $mysqlstring, 5, 2 );

// The timestamp for MySQL string day.

$day = mktime( 0, 0, 0, $md, $mm, $my );

// The day of the week from the timestamp.

$weekday = date( 'w', $day );

if ( !is_numeric($start_of_week) )

$start_of_week = get_option( 'start_of_week' );

if ( $weekday < $start_of_week )

$weekday += 7;

// The most recent week start day on or before $day.

$start = $day - DAY_IN_SECONDS * ( $weekday - $start_of_week );

// $start + 7 days - 1 second.

$end = $start + 7 * DAY_IN_SECONDS - 1;

return compact( 'start', 'end' );

}

関数
substr()　文字列の一部分を返す
mktime()　日付を Unix のタイムスタンプとして取得する
date()　ローカルの日付/時刻を書式化する
is_numeric()　変数が数字または数値形式の文字列であるかを調べる
get_option()　optionsデータベーステーブルから、指定したオプションの値を取得する
compact()　変数名とその値から配列を作成する

定数
DAY_IN_SECONDS　24時間を秒であらわす　24*3600=86400

定義された場所
wp_initial_constants()

- 関数