関数　date_i18n()

2014/11/23 2014/11/24

定義ファイル :/blog/wp-includes/functions.php 1

date_i18n()　日付／時刻を書式化した文字列を取得する

/**
 * Retrieve the date in localized format, based on timestamp.
 *
 * If the locale specifies the locale month and weekday, then the locale will
 * take over the format for the date. If it isn't, then the date format string
 * will be used instead.
 *
 * @since 0.71
 *
 * @param string   $dateformatstring Format to display the date.
 * @param bool|int $unixtimestamp    Optional. Unix timestamp. Default false.
 * @param bool     $gmt              Optional. Whether to use GMT timezone. Default false.
 *
 * @return string The date, translated if locale specifies it.
 */
function date_i18n( $dateformatstring, $unixtimestamp = false, $gmt = false ) {
	global $wp_locale;
	$i = $unixtimestamp;

	if ( false === $i ) {
		if ( ! $gmt )
			$i = current_time( 'timestamp' );
		else
			$i = time();
		// we should not let date() interfere with our
		// specially computed timestamp
		$gmt = true;
	}

	/*
	 * Store original value for language with untypical grammars.
	 * See http://core.trac.wordpress.org/ticket/9396
	 */
	$req_format = $dateformatstring;

	$datefunc = $gmt? 'gmdate' : 'date';

	if ( ( !empty( $wp_locale->month ) ) && ( !empty( $wp_locale->weekday ) ) ) {
		$datemonth = $wp_locale->get_month( $datefunc( 'm', $i ) );
		$datemonth_abbrev = $wp_locale->get_month_abbrev( $datemonth );
		$dateweekday = $wp_locale->get_weekday( $datefunc( 'w', $i ) );
		$dateweekday_abbrev = $wp_locale->get_weekday_abbrev( $dateweekday );
		$datemeridiem = $wp_locale->get_meridiem( $datefunc( 'a', $i ) );
		$datemeridiem_capital = $wp_locale->get_meridiem( $datefunc( 'A', $i ) );
		$dateformatstring = ' '.$dateformatstring;
		$dateformatstring = preg_replace( "/([^\\\])D/", "\\1" . backslashit( $dateweekday_abbrev ), $dateformatstring );
		$dateformatstring = preg_replace( "/([^\\\])F/", "\\1" . backslashit( $datemonth ), $dateformatstring );
		$dateformatstring = preg_replace( "/([^\\\])l/", "\\1" . backslashit( $dateweekday ), $dateformatstring );
		$dateformatstring = preg_replace( "/([^\\\])M/", "\\1" . backslashit( $datemonth_abbrev ), $dateformatstring );
		$dateformatstring = preg_replace( "/([^\\\])a/", "\\1" . backslashit( $datemeridiem ), $dateformatstring );
		$dateformatstring = preg_replace( "/([^\\\])A/", "\\1" . backslashit( $datemeridiem_capital ), $dateformatstring );

		$dateformatstring = substr( $dateformatstring, 1, strlen( $dateformatstring ) -1 );
	}
	$timezone_formats = array( 'P', 'I', 'O', 'T', 'Z', 'e' );
	$timezone_formats_re = implode( '|', $timezone_formats );
	if ( preg_match( "/$timezone_formats_re/", $dateformatstring ) ) {
		$timezone_string = get_option( 'timezone_string' );
		if ( $timezone_string ) {
			$timezone_object = timezone_open( $timezone_string );
			$date_object = date_create( null, $timezone_object );
			foreach( $timezone_formats as $timezone_format ) {
				if ( false !== strpos( $dateformatstring, $timezone_format ) ) {
					$formatted = date_format( $date_object, $timezone_format );
					$dateformatstring = ' '.$dateformatstring;
					$dateformatstring = preg_replace( "/([^\\\])$timezone_format/", "\\1" . backslashit( $formatted ), $dateformatstring );
					$dateformatstring = substr( $dateformatstring, 1, strlen( $dateformatstring ) -1 );
				}
			}
		}
	}
	$j = @$datefunc( $dateformatstring, $i );

	/**
	 * Filter the date formatted based on the locale.
	 *
	 * @since 2.8.0
	 *
	 * @param string $j          Formatted date string.
	 * @param string $req_format Format to display the date.
	 * @param int    $i          Unix timestamp.
	 * @param bool   $gmt        Whether to convert to GMT for time. Default false.
	 */
	$j = apply_filters( 'date_i18n', $j, $req_format, $i, $gmt );
	return $j;
}

/**

* Retrieve the date in localized format, based on timestamp.

* If the locale specifies the locale month and weekday, then the locale will

* take over the format for the date. If it isn't, then the date format string

* will be used instead.

* @since 0.71

* @param string $dateformatstring Format to display the date.

* @param bool|int $unixtimestamp Optional. Unix timestamp. Default false.

* @param bool $gmt Optional. Whether to use GMT timezone. Default false.

* @return string The date, translated if locale specifies it.

function date_i18n( $dateformatstring, $unixtimestamp = false, $gmt = false ) {

global $wp_locale;

$i = $unixtimestamp;

if ( false === $i ) {

if ( ! $gmt )

$i = current_time( 'timestamp' );

else

$i = time();

// we should not let date() interfere with our

// specially computed timestamp

$gmt = true;

}

* Store original value for language with untypical grammars.

* See http://core.trac.wordpress.org/ticket/9396

$req_format = $dateformatstring;

$datefunc = $gmt? 'gmdate' : 'date';

if ( ( !empty( $wp_locale->month ) ) && ( !empty( $wp_locale->weekday ) ) ) {

$datemonth = $wp_locale->get_month( $datefunc( 'm', $i ) );

$datemonth_abbrev = $wp_locale->get_month_abbrev( $datemonth );

$dateweekday = $wp_locale->get_weekday( $datefunc( 'w', $i ) );

$dateweekday_abbrev = $wp_locale->get_weekday_abbrev( $dateweekday );

$datemeridiem = $wp_locale->get_meridiem( $datefunc( 'a', $i ) );

$datemeridiem_capital = $wp_locale->get_meridiem( $datefunc( 'A', $i ) );

$dateformatstring = ' '.$dateformatstring;

$dateformatstring = preg_replace( "/([^\\\])D/", "\\1" . backslashit( $dateweekday_abbrev ), $dateformatstring );

$dateformatstring = preg_replace( "/([^\\\])F/", "\\1" . backslashit( $datemonth ), $dateformatstring );

$dateformatstring = preg_replace( "/([^\\\])l/", "\\1" . backslashit( $dateweekday ), $dateformatstring );

$dateformatstring = preg_replace( "/([^\\\])M/", "\\1" . backslashit( $datemonth_abbrev ), $dateformatstring );

$dateformatstring = preg_replace( "/([^\\\])a/", "\\1" . backslashit( $datemeridiem ), $dateformatstring );

$dateformatstring = preg_replace( "/([^\\\])A/", "\\1" . backslashit( $datemeridiem_capital ), $dateformatstring );

$dateformatstring = substr( $dateformatstring, 1, strlen( $dateformatstring ) -1 );

}

$timezone_formats = array( 'P', 'I', 'O', 'T', 'Z', 'e' );

$timezone_formats_re = implode( '|', $timezone_formats );

if ( preg_match( "/$timezone_formats_re/", $dateformatstring ) ) {

$timezone_string = get_option( 'timezone_string' );

if ( $timezone_string ) {

$timezone_object = timezone_open( $timezone_string );

$date_object = date_create( null, $timezone_object );

foreach( $timezone_formats as $timezone_format ) {

if ( false !== strpos( $dateformatstring, $timezone_format ) ) {

$formatted = date_format( $date_object, $timezone_format );

$dateformatstring = ' '.$dateformatstring;

$dateformatstring = preg_replace( "/([^\\\])$timezone_format/", "\\1" . backslashit( $formatted ), $dateformatstring );

$dateformatstring = substr( $dateformatstring, 1, strlen( $dateformatstring ) -1 );

}

$j = @$datefunc( $dateformatstring, $i );

/**

* Filter the date formatted based on the locale.

* @since 2.8.0

* @param string $j Formatted date string.

* @param string $req_format Format to display the date.

* @param int $i Unix timestamp.

* @param bool $gmt Whether to convert to GMT for time. Default false.

$j = apply_filters( 'date_i18n', $j, $req_format, $i, $gmt );

return $j;

}

変数
$wp_locale　

関数
current_time()　現在の日時を取得する
time()　現在の Unix タイムスタンプを返す
empty()　変数が空であるかどうかを検査する
backslashit()　文字の前と文字列最初の数字の前にバックスラッシュを付与する関数です。
preg_replace()　正規表現検索および置換を行う
strlen()　文字列の長さを得る
implode()　配列要素を文字列により連結する
preg_match()　正規表現によるマッチングを行う
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
timezone_open()　DateTimeZone::__construct() のエイリアス　新しい DateTimeZone オブジェクトを作成する
date_create()　DateTime::__construct() のエイリアス　新しい DateTime オブジェクトを返す
strpos()　文字列内の部分文字列が最初に現れる場所を見つける
date_format()　DateTime::format() のエイリアス　指定した書式でフォーマットした日付を返す
substr()　文字列の一部分を返す
apply_filters()　フィルターフックに追加された関数を呼び出す