/**
* 解析自动任务
* 返回下次执行的时间戳
*
* @param array $crontab
* @param int $timestamp
* @return int
*/
public static function parse(array $conf, $timestamp = null)
{
$crontab = $conf['crontab'];
$times = preg_split('/\\s+/', $crontab);
isset($timestamp) || ($timestamp = time());
$timeInfo = getdate($timestamp);
self::$time[0] = self::field($times[0], $timeInfo['seconds'], 0, 59);
self::$time[1] = self::field($times[1], $timeInfo['minutes'], 0, 59);
self::$time[2] = self::field($times[2], $timeInfo['hours'], 0, 23);
if ($times[5] == '*') {
self::$time[3] = self::field($times[3], $timeInfo['mday'], 1, date('t'));
} else {
self::$time[3] = self::fieldWeek($times[5], $timeInfo['mday'], $timeInfo['wday']);
}
self::$time[4] = self::field($times[4], $timeInfo['mon'], 1, 12);
$year = self::$isCeil ? $timeInfo['year'] + 1 : $timeInfo['year'];
$time = mktime(current(self::$time[2]), current(self::$time[1]), current(self::$time[0]), current(self::$time[4]), current(self::$time[3]), $year);
//重设变量
self::$time = array();
self::$isCeil = true;
return $time;
}
