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    ReflectionClass::getStaticPropertyValue

    (PHP 5 >= 5.1.2, PHP 7, PHP 8)

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

    说明

    public ReflectionClass::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。

    示例

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

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

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

    以上示例会输出：

     
string(3) "Red"

    参见

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    User Contributed Notes 2 notes

    up
    7
    Antares
    12 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
    13 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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