setTimeZone(new \DateTimeZone('UTC')); return $date; } /** * Parses an iCalendar (rfc5545) formatted date and returns a DateTime object. * * @param string $date * @param DateTimeZone $tz * @return DateTime */ static public function parseDate($date, DateTimeZone $tz = null) { // Format is YYYYMMDD $result = preg_match('/^([0-9]{4})([0-1][0-9])([0-3][0-9])$/',$date,$matches); if (!$result) { throw new LogicException('The supplied iCalendar date value is incorrect: ' . $date); } if (is_null($tz)) { $tz = new DateTimeZone('UTC'); } $date = new DateTime($matches[1] . '-' . $matches[2] . '-' . $matches[3], $tz); return $date; } /** * Parses an iCalendar (RFC5545) formatted duration value. * * This method will either return a DateTimeInterval object, or a string * suitable for strtotime or DateTime::modify. * * @param string $duration * @param bool $asString * @return DateInterval|string */ static public function parseDuration($duration, $asString = false) { $result = preg_match('/^(?P\+|-)?P((?P\d+)W)?((?P\d+)D)?(T((?P\d+)H)?((?P\d+)M)?((?P\d+)S)?)?$/', $duration, $matches); if (!$result) { throw new LogicException('The supplied iCalendar duration value is incorrect: ' . $duration); } if (!$asString) { $invert = false; if ($matches['plusminus']==='-') { $invert = true; } $parts = array( 'week', 'day', 'hour', 'minute', 'second', ); foreach($parts as $part) { $matches[$part] = isset($matches[$part])&&$matches[$part]?(int)$matches[$part]:0; } // We need to re-construct the $duration string, because weeks and // days are not supported by DateInterval in the same string. $duration = 'P'; $days = $matches['day']; if ($matches['week']) { $days+=$matches['week']*7; } if ($days) $duration.=$days . 'D'; if ($matches['minute'] || $matches['second'] || $matches['hour']) { $duration.='T'; if ($matches['hour']) $duration.=$matches['hour'].'H'; if ($matches['minute']) $duration.=$matches['minute'].'M'; if ($matches['second']) $duration.=$matches['second'].'S'; } if ($duration==='P') { $duration = 'PT0S'; } $iv = new DateInterval($duration); if ($invert) $iv->invert = true; return $iv; } $parts = array( 'week', 'day', 'hour', 'minute', 'second', ); $newDur = ''; foreach($parts as $part) { if (isset($matches[$part]) && $matches[$part]) { $newDur.=' '.$matches[$part] . ' ' . $part . 's'; } } $newDur = ($matches['plusminus']==='-'?'-':'+') . trim($newDur); if ($newDur === '+') { $newDur = '+0 seconds'; }; return $newDur; } /** * Parses either a Date or DateTime, or Duration value. * * @param string $date * @param DateTimeZone|string $referenceTz * @return DateTime|DateInterval */ static public function parse($date, $referenceTz = null) { if ($date[0]==='P' || ($date[0]==='-' && $date[1]==='P')) { return self::parseDuration($date); } elseif (strlen($date)===8) { return self::parseDate($date, $referenceTz); } else { return self::parseDateTime($date, $referenceTz); } } /** * This method parses a vCard date and or time value. * * This can be used for the DATE, DATE-TIME, TIMESTAMP and * DATE-AND-OR-TIME value. * * This method returns an array, not a DateTime value. * * The elements in the array are in the following order: * year, month, date, hour, minute, second, timezone * * Almost any part of the string may be omitted. It's for example legal to * just specify seconds, leave out the year, etc. * * Timezone is either returned as 'Z' or as '+08:00' * * For any non-specified values null is returned. * * List of date formats that are supported: * YYYY * YYYY-MM * YYYYMMDD * --MMDD * ---DD * * YYYY-MM-DD * --MM-DD * ---DD * * List of supported time formats: * * HH * HHMM * HHMMSS * -MMSS * --SS * * HH * HH:MM * HH:MM:SS * -MM:SS * --SS * * A full basic-format date-time string looks like : * 20130603T133901 * * A full extended-format date-time string looks like : * 2013-06-03T13:39:01 * * Times may be postfixed by a timezone offset. This can be either 'Z' for * UTC, or a string like -0500 or +1100. * * @param string $date * @return array */ static public function parseVCardDateTime($date) { $regex = '/^ (?: # date part (?: (?: (?P [0-9]{4}) (?: -)?| --) (?P [0-9]{2})? |---) (?P [0-9]{2})? )? (?:T # time part (?P [0-9]{2} | -) (?P [0-9]{2} | -)? (?P [0-9]{2})? (?P # timezone offset Z | (?: \+|-)(?: [0-9]{4}) )? )? $/x'; if (!preg_match($regex, $date, $matches)) { // Attempting to parse the extended format. $regex = '/^ (?: # date part (?: (?P [0-9]{4}) - | -- ) (?P [0-9]{2}) - (?P [0-9]{2}) )? (?:T # time part (?: (?P [0-9]{2}) : | -) (?: (?P [0-9]{2}) : | -)? (?P [0-9]{2})? (?P # timezone offset Z | (?: \+|-)(?: [0-9]{2}:[0-9]{2}) )? )? $/x'; if (!preg_match($regex, $date, $matches)) { throw new InvalidArgumentException('Invalid vCard date-time string: ' . $date); } } $parts = array( 'year', 'month', 'date', 'hour', 'minute', 'second', 'timezone' ); $result = array(); foreach($parts as $part) { if (empty($matches[$part])) { $result[$part] = null; } elseif ($matches[$part] === '-' || $matches[$part] === '--') { $result[$part] = null; } else { $result[$part] = $matches[$part]; } } return $result; } /** * This method parses a vCard TIME value. * * This method returns an array, not a DateTime value. * * The elements in the array are in the following order: * hour, minute, second, timezone * * Almost any part of the string may be omitted. It's for example legal to * just specify seconds, leave out the hour etc. * * Timezone is either returned as 'Z' or as '+08:00' * * For any non-specified values null is returned. * * List of supported time formats: * * HH * HHMM * HHMMSS * -MMSS * --SS * * HH * HH:MM * HH:MM:SS * -MM:SS * --SS * * A full basic-format time string looks like : * 133901 * * A full extended-format time string looks like : * 13:39:01 * * Times may be postfixed by a timezone offset. This can be either 'Z' for * UTC, or a string like -0500 or +11:00. * * @param string $date * @return array */ static public function parseVCardTime($date) { $regex = '/^ (?P [0-9]{2} | -) (?P [0-9]{2} | -)? (?P [0-9]{2})? (?P # timezone offset Z | (?: \+|-)(?: [0-9]{4}) )? $/x'; if (!preg_match($regex, $date, $matches)) { // Attempting to parse the extended format. $regex = '/^ (?: (?P [0-9]{2}) : | -) (?: (?P [0-9]{2}) : | -)? (?P [0-9]{2})? (?P # timezone offset Z | (?: \+|-)(?: [0-9]{2}:[0-9]{2}) )? $/x'; if (!preg_match($regex, $date, $matches)) { throw new InvalidArgumentException('Invalid vCard time string: ' . $date); } } $parts = array( 'hour', 'minute', 'second', 'timezone' ); $result = array(); foreach($parts as $part) { if (empty($matches[$part])) { $result[$part] = null; } elseif ($matches[$part] === '-') { $result[$part] = null; } else { $result[$part] = $matches[$part]; } } return $result; } }