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<?php
namespace Yoast\WP\SEO\Helpers;
use DateTime;
use DateTimeZone;
use Exception;
/**
* A helper object for dates.
*/
class Date_Helper {
/**
* Convert given date string to the W3C format.
*
* If $translate is true then the given date and format string will
* be passed to date_i18n() for translation.
*
* @param string $date Date string to convert.
* @param bool $translate Whether the return date should be translated. Default false.
*
* @return string Formatted date string.
*/
public function mysql_date_to_w3c_format( $date, $translate = false ) {
return \mysql2date( \DATE_W3C, $date, $translate );
}
/**
* Formats a given date in UTC TimeZone format.
*
* @param string $date String representing the date / time.
* @param string $format The format that the passed date should be in.
*
* @return string The formatted date.
*/
public function format( $date, $format = \DATE_W3C ) {
if ( ! \is_string( $date ) ) {
return $date;
}
$immutable_date = \date_create_immutable_from_format( 'Y-m-d H:i:s', $date, new DateTimeZone( 'UTC' ) );
if ( ! $immutable_date ) {
return $date;
}
return $immutable_date->format( $format );
}
/**
* Formats the given timestamp to the needed format.
*
* @param int $timestamp The timestamp to use for the formatting.
* @param string $format The format that the passed date should be in.
*
* @return string The formatted date.
*/
public function format_timestamp( $timestamp, $format = \DATE_W3C ) {
if ( ! \is_string( $timestamp ) && ! \is_int( $timestamp ) ) {
return $timestamp;
}
$immutable_date = \date_create_immutable_from_format( 'U', $timestamp, new DateTimeZone( 'UTC' ) );
if ( ! $immutable_date ) {
return $timestamp;
}
return $immutable_date->format( $format );
}
/**
* Formats a given date in UTC TimeZone format and translate it to the set language.
*
* @param string $date String representing the date / time.
* @param string $format The format that the passed date should be in.
*
* @return string The formatted and translated date.
*/
public function format_translated( $date, $format = \DATE_W3C ) {
return \date_i18n( $format, $this->format( $date, 'U' ) );
}
/**
* Returns the current time measured in the number of seconds since the Unix Epoch (January 1 1970 00:00:00 GMT).
*
* @return int The current time measured in the number of seconds since the Unix Epoch (January 1 1970 00:00:00 GMT).
*/
public function current_time() {
return \time();
}
/**
* Check if a string is a valid datetime.
*
* @param string $datetime String input to check as valid input for DateTime class.
*
* @return bool True when datetime is valid.
*/
public function is_valid_datetime( $datetime ) {
if ( $datetime === null ) {
/*
* While not "officially" supported, `null` will be handled as `"now"` until PHP 9.0.
* @link https://3v4l.org/tYp2k
*/
return true;
}
if ( \is_string( $datetime ) && \substr( $datetime, 0, 1 ) === '-' ) {
return false;
}
try {
return new DateTime( $datetime ) !== false;
} catch ( Exception $exception ) {
return false;
}
}
}