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 $name the method name     * @return boolean whether the method is defined     */    public function hasMethod($name)    {        return method_exists($this, $name);//返回Boolean值。    }    }

下面来介绍console/Controller.php

      [--param1=value1 --param2 ...] * ~~~ * * * @property string $help This property is read-only. * @property string $helpSummary This property is read-only. * * @author Qiang Xue 
     
       * @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;