public function canGetProperty($name, $checkVars = true){//property_exists — 检查对象或类是否具有该属性return method_exists($this, 'get' . $name) || $checkVars && property_exists($this, $name);}/*** Returns a value indicating whether a property can be set.* 返回一个值指示是否可以设置一个属性。* A property is writable if:** - the class has a setter method associated with the specified name*   (in this case, property name is case-insensitive);* - the class has a member variable with the specified name (when `$checkVars` is true);** 检查对象或类是否能够设置 $name 属性，如果 $checkVars 为 true，则不局限于是否有 setter** @param string $name the property name* @param boolean $checkVars whether to treat member variables as properties* @return boolean whether the property can be written* @see canGetProperty()*/public function canSetProperty($name, $checkVars = true){return method_exists($this, 'set' . $name) || $checkVars && property_exists($this, $name);//检查对象或类是否能够设置 $name 属性,返回Boolean值。
}/*** Returns a value indicating whether a method is defined.* 返回一个值指示是否定义了一个方法。* The default implementation is a call to php function `method_exists()`.* You may override this method when you implemented the php magic method `__call()`.** 检查对象或类是否具有 $name 方法** @param string $name the method name* @return boolean whether the method is defined*/publicfunction hasMethod($name){return method_exists($this, $name);//返回Boolean值。
}}

下面来介绍console/Controller.php

<?php/*** @linkhttp://www.yiiframework.com/* @copyright Copyright (c) 2008 Yii Software LLC* @licensehttp://www.yiiframework.com/license/*/
namespaceyii\console;
use Yii;
use yii\base\Action;
use yii\base\InlineAction;
use yii\base\InvalidRouteException;
use yii\helpers\Console;/*** Controller is the base class of console command classes.* 控制器是控制台命令类的基类.** A console controller consists of one or several actions known as sub-commands.* 一个控制台控制器由一个或几个动作称为sub-commands。* Users call a console command by specifying the corresponding route which identifies a controller action.* 用户调用一个控制台命令通过指定相应的路线确定控制器动作* The `yii` program is used when calling a console command, like the following:* yii的程序调用时使用控制台命令,如下:** ~~~* yii <route> [--param1=value1 --param2 ...]* ~~~*** @property string $help This property is read-only.* @property string $helpSummary This property is read-only.** @author Qiang Xue <qiang.xue@gmail.com>* @since 2.0*/
class Controller extends \yii\base\Controller
{const EXIT_CODE_NORMAL = 0;const EXIT_CODE_ERROR = 1;/*** @var boolean whether to run the command interactively.* 是否运行该命令交互*/public $interactive = true;/*** @var boolean whether to enable ANSI color in the output.* 是否支持ANSI颜色在输出* If not set, ANSI color will only be enabled for terminals that support it.* 如果没有设置,ANSI颜色只会支持终端支持它。*/public$color;