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                ```php <?php /** * 行為型模式 * * php狀態模式 * 理解:行為隨著狀態變化 * 區別: * - 策略的改變由client完成,client持有context的引用;而狀態的改變是由context或狀態自己, * 就是自身持有context * - 簡單說就是策略是client持有context,而狀態是本身持有context * 使用場景:大量和對象狀態相關的條件語句 * * 下面我們來實現一個農民四季種菜 * 春季:玉米 * 夏季:黃瓜 * 秋季:白菜 * 冬季:菠菜 * * * @author TIGERB <https://github.com/TIGERB> * @example 運行 php test.php */ // 注冊自加載 spl_autoload_register('autoload'); function autoload($class) { require dirname($_SERVER['SCRIPT_FILENAME']) . '//..//' . str_replace('\\', '/', $class) . '.php'; } /************************************* test *************************************/ use state\Farmer; try { // 初始化一個農民 $farmer = new Farmer(); // 春季 $farmer->grow(); $farmer->harvest(); // 夏季 $farmer->grow(); $farmer->harvest(); // 秋季 $farmer->grow(); $farmer->harvest(); // 冬季 $farmer->grow(); $farmer->harvest(); } catch (\Exception $e) { echo 'error:' . $e->getMessage(); }
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