php中的装饰,详解PHP装饰模式的示例代码
詳解PHP裝飾模式的示例代碼<?php
// 裝飾模式
function echoLine($msg) {
echo $msg, '
';
}
class RequestHelper
{
/**
* return class resource id
*/
public function toString()
{
ob_start();
var_dump($this);
$str = ob_get_clean();
if (preg_match('/object\(' . CLASS . '\)\#\d+/', $str, $matches)) {
return $matches[0];
}
return CLASS;
}
}
// ---------------------------------------------------------
interface ProcessRequest
{
public function process(RequestHelper $req);
}
/**
* http request
*/
class HttpRequest implements ProcessRequest
{
public function process(RequestHelper $req)
{
echoLine('Process http request[' . $req . ']');
}
}
/**
* Log Decorator
* add log function
*/
class LogRequest implements ProcessRequest
{
protected $pr;
public function construct(ProcessRequest $pr)
{
$this->pr = $pr;
}
public function process(RequestHelper $req)
{
echoLine('Add log function!');
$this->pr->process($req);
}
}
/**
* Authenticate Decorator
* add authenticate function
*/
class AuthenticateRquest implements ProcessRequest
{
protected $pr;
public function construct(ProcessRequest $pr)
{
$this->pr = $pr;
}
public function process(RequestHelper $req)
{
echoLine('Add authenticate function!');
$this->pr->process($req);
}
}
// test code
$req = new RequestHelper();
$process = new HttpRequest();
// add log
$process = new LogRequest($process);
// add auth
$process = new AuthenticateRquest($process);
// process request
$process->process($req);
總結
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