ReflectionClass::getStaticPropertyValue()

(PHP 5 >= 5.1.2, PHP 7)

获取静态（static）属性的值

说明

publicReflectionClass::getStaticPropertyValue(string $name[,mixed&$def_value]): mixed

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。

$def_value

假如类没有定义$name的 static 属性，将返回一个默认值。如果属性不存在，并且省略了此参数，将会抛出ReflectionException。

返回值

静态属性的值。

范例

Example #1ReflectionClass::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

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';

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
?>