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<?php
/**
 * Yoast SEO: News plugin file.
 *
 * @package WPSEO_News\XML_Sitemaps
 */

/**
 * Convert the sitemap dates to the correct timezone.
 */
class WPSEO_News_Sitemap_Timezone {

/**
	 * Returns the timezone string for a site, even if it's set to a UTC offset.
	 *
	 * @return string
	 */
	public function __toString() {
		return $this->wp_get_timezone_string();
	}

/**
	 * Returns the timezone string for a site, even if it's set to a UTC offset.
	 *
	 * Adapted from http://www.php.net/manual/en/function.timezone-name-from-abbr.php#89155
	 *
	 * @since 7.0 Changed the visibility of the method from private to public.
	 *
	 * @return string Valid PHP timezone string.
	 */
	public function wp_get_timezone_string() {

// If site timezone string exists, return it.
		if ( $timezone = get_option( 'timezone_string' ) ) {
			return $timezone;
		}

// Get UTC offset, if it isn't set then return UTC.
		if ( 0 === ( $utc_offset = get_option( 'gmt_offset', 0 ) ) ) {
			return 'UTC';
		}

// Adjust UTC offset from hours to seconds.
		$utc_offset *= HOUR_IN_SECONDS;

// Attempt to guess the timezone string from the UTC offset.
		$timezone = timezone_name_from_abbr( '', $utc_offset );

if ( false !== $timezone ) {
			return $timezone;
		}

// Last try, guess timezone string manually.
		$timezone_id = $this->get_timezone_id( $utc_offset );
		if ( $timezone_id ) {
			return $timezone_id;
		}

// Fallback to UTC.
		return 'UTC';
	}

/**
	 * Getting the timezone id.
	 *
	 * @param string $utc_offset Offset to use.
	 *
	 * @return mixed
	 */
	private function get_timezone_id( $utc_offset ) {
		$is_dst = date( 'I' );

foreach ( timezone_abbreviations_list() as $abbr ) {
			foreach ( $abbr as $city ) {
				if ( $city['dst'] === $is_dst && $city['offset'] === $utc_offset ) {
					return $city['timezone_id'];
				}
			}
		}

return false;
	}
}

[+] ..
[-] upgrade-manager.php [edit]
[-] sitemap.php [edit]
[-] head.php [edit]
[-] class-wpseo-news.php [edit]
[-] class-sitemap-item.php [edit]
[-] class-meta-box.php [edit]
[-] sitemap-timezone.php [edit]
[-] class-beacon-setting.php [edit]
[-] meta-box.php [edit]
[-] wpseo-news.php [edit]
[-] class-product.php [edit]
[-] javascript-strings.php [edit]
[-] sitemap-images.php [edit]
[-] class-head.php [edit]
[-] class-sitemap.php [edit]
[-] class-upgrade-manager.php [edit]
[-] beacon-setting.php [edit]
[-] class-admin-page.php [edit]
[-] class-news-wrappers.php [edit]
[-] class-sitemap-images.php [edit]
[-] wrappers.php [edit]
[-] sitemap-item.php [edit]
[-] product.php [edit]
[-] class-javascript-strings.php [edit]
[-] schema.php [edit]
[-] admin-page.php [edit]
[-] excludable-taxonomies.php [edit]
[-] class-sitemap-timezone.php [edit]