[edit] Last updated: Fri, 17 May 2013

ReflectionClass::getStaticPropertyValue

(PHP 5 >= 5.1.0)

ReflectionClass::getStaticPropertyValue — 获取静态（static）属性的值

说明

public mixed ReflectionClass::getStaticPropertyValue ( string $name )

获取这个类里静态（static）属性的值。

参数

name: 静态属性的名称，来返回它的值。

返回值

静态属性的值。

范例

Example #1 ReflectionClass::getStaticPropertyValue() 的基本用法


<?php
class Apple {
    public static $color = 'Red';
}

$class = new ReflectionClass('Apple');
var_dump($class->getStaticPropertyValue('color'));
?>

以上例程会输出：

string(3) "Red"

参见

ReflectionClass::getStaticProperties() - 获取静态（static）属性
ReflectionClass::setStaticPropertyValue() - 设置静态属性的值

add a note User Contributed Notes ReflectionClass::getStaticPropertyValue - [2 notes]

down

Antares ¶

1 year ago


It seems this method has a security level different from the getStaticProperties method.





If you make two classes A and B looking like





<?php


class A{


        protected static $static_var='foo';





        public function getStatic(){


           $class=new ReflectionClass($this);


           return $class->getStaticPropertyValue('static_var');


        }





        public function getStatic2(){


            $class=new ReflectionClass($this);


            $staticProps=$class->getStaticProperties();


            return $staticProps['static_var'];


        }





        public function __construct(){


              echo $this->getStatic2();


              echo $this->getStatic();


        }


}





class B extends A{


        protected static $static_var='foo2';





}


?>





Then the output will be an exception for the getStatic() call, when the getStatic2() will correctly return 'foo2';

down

Mauro Gabriel Titimoli ¶

3 years ago


If you want to change a static property of a variable class...



PHP 5.2

<?php

$reflection = new ReflectionClass($className);

$staticPropertyReference = & $reflection->getStaticPropertyValue($staticPropertyName);



$staticPropertyReference = 'new value';

?>



PHP 5.3

<?php

$className::$$classProperty

?>

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