适配器

<?php
/**
 * Created by PhpStorm.
 * User: ytron123
 * Date: 18/3/23
 * Time: 下午3:46
 */
class err{
    private $err;
    public function __construct($err){
        $this->err = $err;
    }
    public function getErr(){
        return $this->err;
    }
}
class fileErr{
    private $errObj;
    public function __construct(err $obj){
        $this->errObj   =   $obj;
    }
    public function intoErr(){
        $data   =   $this->errObj->getErr();
        echo $data;
    }
}
//$obErr  =   new err('错误信息|21212');
//$obFile =   new fileErr($obErr);
//$obFile->intoErr();
//echo '<hr />';
/////实现适配
class newErr extends err{
    private $err;
    private $errMsg;
    private $errCode;
    public function __construct($errData){
        parent::__construct($errData);
        $data = explode('|',$this->getErr());
        $this->errMsg   =   $data[0];
        $this->errCode   =   $data[1];
    }
    public function getErrMsg(){
        return $this->errMsg;
    }
    public function getErrCode(){
        return $this->errCode;
    }
}
class newfileErr{
    private $errMsg;
    public function __construct(newErr $obj){
        $this->errMsg   =   $obj;
    }
    public function newIntoErr(){
        echo $this->errMsg->getErrCode();
        echo $this->errMsg->getErrMsg();
    }
}
$obNewErr   =   new newErr('错误信息|21212');
$obNewFile  =   new newfileErr($obNewErr);
$obNewFile->newIntoErr();