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<?php |
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namespace EventEspresso\core\domain\entities; |
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use DateTime; |
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use DateTimeZone; |
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use DomainException; |
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/** |
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* Class DbSafeDateTime |
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* Some versions of PHP do bad things when you try to serialize a DateTime object for storage. |
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* This DateTime class extension can be safely serialized and unserialized, |
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* because the only data it stores is a string containing all o fits relevant details |
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* |
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* @package Event Espresso |
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* @author Brent Christensen |
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*/ |
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class DbSafeDateTime extends DateTime |
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{ |
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// phpcs:disable Generic.NamingConventions.UpperCaseConstantName.ClassConstantNotUpperCase |
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/** |
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* @type string db_safe_timestamp_format |
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*/ |
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const db_safe_timestamp_format = 'Y-m-d H:i:s O e'; |
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// phpcs:enable |
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// phpcs:disable PSR2.Classes.PropertyDeclaration.Underscore |
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/** |
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* DateTime object converted to a string that includes the date, time, UTC offset, and timezone identifier |
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* |
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* @type string $_datetime_string |
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*/ |
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protected $_datetime_string = ''; |
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/** |
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* where to write the error log to |
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* |
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* @type string $_error_log_dir |
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*/ |
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protected $_error_log_dir = ''; |
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// phpcs:enable |
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/** |
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* @param string $error_log_dir |
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*/ |
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public function setErrorLogDir($error_log_dir) |
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{ |
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// if the folder path is writable, then except the path + filename, else keep empty |
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$this->_error_log_dir = is_writable(str_replace(basename($error_log_dir), '', $error_log_dir)) |
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? $error_log_dir |
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: ''; |
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} |
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/** |
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* @return string |
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*/ |
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public function __toString() |
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{ |
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return $this->format(DbSafeDateTime::db_safe_timestamp_format); |
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} |
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/** |
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* @return array |
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*/ |
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public function __sleep() |
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{ |
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$this->_datetime_string = $this->format(DbSafeDateTime::db_safe_timestamp_format); |
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$date = DateTime::createFromFormat( |
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DbSafeDateTime::db_safe_timestamp_format, |
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$this->_datetime_string |
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); |
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if (! $date instanceof DateTime) { |
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try { |
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// we want a stack trace to determine where the malformed date came from, so... |
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throw new DomainException(''); |
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} catch (DomainException $e) { |
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$stack_trace = $e->getTraceAsString(); |
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} |
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$this->writeToErrorLog( |
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sprintf( |
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__( |
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'A valid DateTime could not be generated from "%1$s" because the following errors occurred: %2$s %3$s %2$s PHP version: %4$s %2$s Stack Trace: %5$s', |
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'event_espresso' |
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), |
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$this->_datetime_string, |
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'<br />', |
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print_r(DateTime::getLastErrors(), true), |
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PHP_VERSION, |
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$stack_trace |
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) |
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); |
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} |
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return array('_datetime_string'); |
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} |
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/** |
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* if an empty or null value got saved to the db for a datetime, |
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* then some servers and/or PHP itself will incorrectly convert that date string |
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* resulting in "-0001-11-30" for the year-month-day. |
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* see the Notes section |
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* |
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* @link http://php.net/manual/en/datetime.formats.date.php |
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* We'll replace those with "0000-00-00" which will allow a valid DateTime object to be created, |
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* but still result in the internal date for that object being set to "-0001-11-30 10:00:00.000000". |
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* so we're no better off, but at least things won't go fatal on us. |
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*/ |
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public function __wakeup() |
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{ |
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$date = self::createFromFormat( |
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DbSafeDateTime::db_safe_timestamp_format, |
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$this->_datetime_string |
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); |
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if (! $date instanceof DateTime) { |
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$this->writeToErrorLog( |
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sprintf( |
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__( |
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'A valid DateTime could not be recreated from "%1$s" because the following errors occurred: %2$s %3$s %2$s PHP version: %4$s', |
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'event_espresso' |
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), |
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$this->_datetime_string, |
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'<br />', |
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print_r(DateTime::getLastErrors(), true), |
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PHP_VERSION |
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) |
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); |
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} else { |
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$this->__construct( |
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$date->format(\EE_Datetime_Field::mysql_timestamp_format), |
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new DateTimeZone($date->format('e')) |
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); |
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} |
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} |
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/** |
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* Normalizes incoming date string so that it is a bit more stable for use. |
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* @param string $date_string |
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* @return string |
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*/ |
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public static function normalizeInvalidDate($date_string) |
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{ |
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return str_replace( |
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array('-0001-11-29', '-0001-11-30', '0000-00-00'), |
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'0000-01-01', |
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$date_string |
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); |
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} |
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/** |
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* Creates a DbSafeDateTime from ye old DateTime |
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* |
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* @param DateTime $datetime |
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* @return \EventEspresso\core\domain\entities\DbSafeDateTime |
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*/ |
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public static function createFromDateTime(DateTime $datetime) |
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{ |
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return new DbSafeDateTime( |
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$datetime->format(\EE_Datetime_Field::mysql_timestamp_format), |
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new DateTimeZone($datetime->format('e')) |
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); |
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} |
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/** |
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* Parse a string into a new DateTime object according to the specified format |
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* |
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* @param string $format Format accepted by date(). |
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* @param string $time String representing the time. |
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* @param DateTimeZone $timezone A DateTimeZone object representing the desired time zone. |
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* @return DbSafeDateTime|boolean |
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* @link https://php.net/manual/en/datetime.createfromformat.php |
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*/ |
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public static function createFromFormat($format, $time, $timezone = null) |
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{ |
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$time = self::normalizeInvalidDate($time); |
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// Various php versions handle the third argument differently. This conditional accounts for that. |
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$DateTime = $timezone === null |
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? parent::createFromFormat($format, $time) |
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: parent::createFromFormat($format, $time, $timezone); |
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return $DateTime instanceof DateTime |
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? self::createFromDateTime($DateTime) |
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: $DateTime; |
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} |
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/** |
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* @param string $message |
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*/ |
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private function writeToErrorLog($message) |
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{ |
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if (! empty($this->_error_log_dir)) { |
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/** @noinspection ForgottenDebugOutputInspection */ |
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error_log($message, 3, $this->_error_log_dir); |
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} else { |
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/** @noinspection ForgottenDebugOutputInspection */ |
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error_log($message); |
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} |
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} |
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} |
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eventespresso /
event-espresso-core
