ReflectionClass::getStaticPropertyValue

(PHP 5 >= 5.1.2, PHP 7)

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

说明

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

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 #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

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User Contributed Notes 2 notes

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3
Antares
6 years 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';
up
-1
Mauro Gabriel Titimoli
8 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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