come and get it php設計模式 Command指令模式

/**
* 命令模式
*
* 將一個請求封裝為一個物件從而使你可用不同的請求對客戶進行參數化,對請求排除或記錄請求日誌,以及支援可取消的操作
*/
介面指令
{
public functionexecute();
}
呼叫者類別
{
private $_command = array();
public function setCommand($command) {
$this->_command[] = $command;
}
公共函數executeCommand()
{
foreach($this->_command as $command)
{
$command->execute();
}
}
公用函數removeCommand($command)
{
$key = array_search($command, $this->_command);
if($key !== false)
{
unset($this->_command[$key]);
}
}
}
類別接收者
{
private $_name = null;
public function __construct($name) {
$this->_name = $name;
}
public function action()
{
echo $this->_name." action
";
}
public function action1()
{
echo $this->_name." action1
";
}
}
類別 ConcreteCommand 實作 Command
{
private $_receiver;
公用函數 __construct($receiver)
{
$this->_receiver = $receiver;
}
公用函數execute()
{
$this->_receiver->action();
}
}
類別 ConcreteCommand1 實作 Command
{
private $_receiver;
公用函數 __construct($receiver)
{
$this->_receiver = $receiver;
}
公用函數execute()
{
$this->_receiver->action1();
}
}
類別 ConcreteCommand2 實作 Command
{
private $_receiver;
公用函數 __construct($receiver)
{
$this->_receiver = $receiver;
}
公用函數execute()
{
$this->_receiver->action();
$this->_receiver->action1();
}
}
$objRecevier = new Receiver("No.1");
$objRecevier1 = new Receiver("No.2");
$objRecevier2 = new Receiver("No.3");
$objCommand = new ConcreteCommand($objRecevier);
$objCommand1 = new ConcreteCommand1($objRecevier);
$objCommand2 = new ConcreteCommand($objRecevier1);
$objCommand3 = new ConcreteCommand1($objRecevier1);
$objCommand4 = new ConcreteCommand2($objRecevier2); // 使用 Recevier 的兩個方法
$objInvoker = new Invoker();
$objInvoker->setCommand($objCommand);
$objInvoker->setCommand($objCommand1);
$objInvoker->executeCommand();
$objInvoker->removeCommand($objCommand1);
$objInvoker->executeCommand();
$objInvoker->setCommand($objCommand2);
$objInvoker->setCommand($objCommand3);
$objInvoker->setCommand($objCommand4);
$objInvoker->executeCommand();
[/代碼]

以上就介紹了拿來php設計模式指令指令模式，包含拿來方面的內容，希望對PHP教學有興趣的朋友得到幫忙。