'Y-m-d H:i:s', 'iso' => 'Y-m-d\TH:i:s', 'us' => 'm/d/Y h:i:s A', 'uk' => 'd/m/Y H:i:s' ]; public function addFormat($name, $format) { $this->formats[$name] = $format; } public function getTime($formatName = 'standard') { $now = new DateTime(); if (isset($this->formats[$formatName])) { return $now->format($this->formats[$formatName]); } else { try { return $now->format($formatName); } catch (Exception $e) { return "Invalid format: $formatName"; } } } } // 使用示例 $timeDisplay = new CustomTimeDisplay(); echo $timeDisplay->getTime() . "\n"; // 标准格式 echo $timeDisplay->getTime('us') . "\n"; // 美国格式 $timeDisplay->addFormat('chinese', 'Y年m月d日 H时i分s秒'); echo $timeDisplay->getTime('chinese') . "\n"; // 中文格式 ?>