date_i18n

Source code

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 );

	// allow plugins to redo this entirely for languages with untypical grammars

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

	return $j;

}