63 lines
1.5 KiB
PHP
63 lines
1.5 KiB
PHP
<?php
|
|
/**
|
|
* Sitemap date format class.
|
|
*
|
|
* @since 0.9.0
|
|
* @package RankMath
|
|
* @subpackage RankMath\Sitemap
|
|
* @author Rank Math <support@rankmath.com>
|
|
*
|
|
* @copyright Copyright (C) 2008-2019, Yoast BV
|
|
* The following code is a derivative work of the code from the Yoast(https://github.com/Yoast/wordpress-seo/), which is licensed under GPL v3.
|
|
*/
|
|
|
|
namespace RankMath\Sitemap;
|
|
|
|
use DateTime;
|
|
use Exception;
|
|
use DateTimeZone;
|
|
|
|
defined( 'ABSPATH' ) || exit;
|
|
|
|
/**
|
|
* Timezone.
|
|
*/
|
|
class Timezone {
|
|
|
|
/**
|
|
* Format arbitrary UTC datetime string to desired form in site's time zone.
|
|
*
|
|
* @param string $datetime_string The input datetime string in UTC time zone.
|
|
* @param string $format Date format to use.
|
|
*
|
|
* @return string
|
|
*/
|
|
public function format_date( $datetime_string, $format = DATE_W3C ) {
|
|
if ( empty( $datetime_string ) || false === $this->is_valid_datetime( $datetime_string ) ) {
|
|
return '';
|
|
}
|
|
|
|
$date_time = new DateTime( $datetime_string, new DateTimeZone( 'UTC' ) );
|
|
|
|
return false === $date_time ? '' : $date_time->format( $format );
|
|
}
|
|
|
|
/**
|
|
* Check if a string is a valid datetime.
|
|
*
|
|
* @param string $datetime String input to check as valid input for DateTime class.
|
|
* @return boolean
|
|
*/
|
|
private function is_valid_datetime( $datetime ) {
|
|
if ( substr( $datetime, 0, 1 ) === '-' ) {
|
|
return false;
|
|
}
|
|
|
|
try {
|
|
return new DateTime( $datetime ) !== false;
|
|
} catch ( Exception $exc ) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|