适配器设计模式是什么？
PHP 基础面试题
<?php
//适配器设计模式只是将某个对象的接口适配为另一个对象所期望的接口。
class errorObject{
private $_error;
public function __construct($error){
$this->_error = $error;
}
public function getError(){
return $this->_error;
}
}
class logToConsole{
private $_errorObject;
public function __construct($errorObject){
$this->_errorObject = $errorObject;
}
public function write(){
fwrite(STDERR, $this->_errorObject->getError());
}
}
$error = new errorObject('404:Not Found');
$log = new logToConsole($error);
$log->write();
class logToCSV{
const CSV_LOCATION = 'log.csv';
private $_errorObject;
public function __construct($errorObject){
$this->_errorObject = $errorObject;
}
public function write(){
$line = $this->_errorObject->getErrorNumber();
$line .= ',';
$line .= $this->_errorObject->getErrorText();
$line .= "\n";
file_put_contents(self::CSV_LOCATION, $line, FILE_APPEND);
}
}
class logToCSVAdapter extends errorObject{
private $_errorNumber;
private $_errorText;
public function __construct($error){
parent::__construct($error);
$parts = explode(':', $this->getError());
$this->_errorNumber = $parts[0];
$this->_errorText = $parts[1];
}
public function getErrorNumber(){
return $this->_errorNumber;
}
public function getErrorText(){
return $this->_errorText;
}
}
$error = new logToCSVAdapter('404:Not Found');
$log = new logToCSV($error);
$log->write();