<?php
//解释器设计模式用于分析一个实体的关键元素，并且针对每个元素都提供自己的解释或相应的动作。
class User{
protected $_username = '';
public function __construct($username){
$this->_username = $username;
}
public function getProfilePage(){
$profile = "<h2>I like Never Again!</h2>";
$profile .= "I love all of their songs.My favorite CD:<br />";
$profile .= "`myCD`.`getTitle`!!";
return $profile;
}
}
class userCD{
protected $_user = NULL;
public function setUser($user){
$this->_user = $user;
}
public function getTitle(){
$title = 'Waste of Rib';
return $title;
}
}
class userCDInterpreter{
protected $_user = NULL;
public function setUser($user){
$this->_user = $user;
}
public function getInterpreted(){
$profile = $this->_user->getProfilePage();
if(preg_match_all('/\{\{myCD\.(.*?)\}\}/', $profile, $triggers, PREG_SET_ORDER)){
$replacements = [];
foreach($triggers as $trigger){
$replacements[] = $trigger[1];
}
$replacements = array_unique($replacements);
$myCD = new userCD();
$myCD->setUser($this->_user);
foreach($replacements as $replacement){
$profile = str_replace("{{myCD.{$replacement}}}", call_user_func([$myCD, $replacement]), $profile);
}
}
return $profile;
}
}
$username = 'aaron';
$user = new User($username);
$interpreter = new userCDInterpreter();
$interpreter->setUser($user);
echo "<h1>{$username}'s Profile'</h1>";
echo $interpreter->getInterpreted();