PHP 面向对象 （十一）反射类

反射技术
原理：通过反射类，可以知道一切类信息，从而实现更加健壮的代码
作用：
    写底层框架
    扩展类功能
    管理大量未知类

demo11.php
username = $username;
        $this->password = $password;
    }

    /**
     * 获取用户名
     * @return string
     */
    public function getUsername()
    {
        return $this->username;
    }

    /**
     * 设置用户名
     * @param string $username
     */
    public function setUsername($username)
    {
        $this->username = $username;
    }

    /**
     * 获取密码
     * @return string
     */

    private function getPassword()
    {
        return $this->password;
    }


    /**
     * 设置密码
     * @param string $password
     */
    private function setPassowrd($password)
    {
        $this->password = $password;
    }
}



$class = new ReflectionClass('Extend\User');  // 将类名User作为参数，即可建立User类的反射类

echo '将类名User作为参数，即可建立User类的反射类';echo "
";

echo "
";var_dump($class);echo "
";echo "
";

$properties = $class->getProperties();  // 获取User类的所有属性，返回ReflectionProperty的数组

echo '获取User类的所有属性，返回ReflectionProperty的数组';echo "
";

echo "
";var_dump($properties);echo "
";echo "
";

$property = $class->getProperty('password'); // 获取User类的password属性ReflectionProperty

echo '获取User类的password属性ReflectionProperty';echo "
";

echo "
";var_dump($property);echo "
";echo "
";

$methods = $class->getMethods();   // 获取User类的所有方法，返回ReflectionMethod数组

echo '获取User类的所有方法，返回ReflectionMethod数组';echo "
";

echo "
";var_dump($methods);echo "
";echo "
";

$method = $class->getMethod('getUsername');  // 获取User类的getUsername方法的ReflectionMethod

echo '获取User类的getUsername方法的ReflectionMethod';echo "
";

echo "
";var_dump($method);echo "
";echo "
";

$constants = $class->getConstants();   // 获取所有常量，返回常量定义数组

echo '获取所有常量，返回常量定义数组';echo "
";

echo "
";var_dump($constants);echo "
";echo "
";

$constant = $class->getConstant('ROLE');   // 获取ROLE常量

echo '获取ROLE常量';echo "
";

echo "
";var_dump($constant);echo "
";echo "
";

$namespace = $class->getNamespaceName();  // 获取类的命名空间

echo '获取类的命名空间';echo "
";

echo "
";var_dump($namespace);echo "
";echo "
";

$comment_class = $class->getDocComment();  // 获取User类的注释文档，即定义在类之前的注释

echo '获取User类的注释文档，即定义在类之前的注释';echo "
";

echo "
";var_dump($comment_class);echo "
";echo "
";

$comment_method = $class->getMethod('getUsername')->getDocComment();  // 获取User类中getUsername方法的注释文档

echo '获取User类中getUsername方法的注释文档';echo "
";

echo "
";var_dump($comment_class);echo "
";echo "
";