ReflectionProperty::setValue()

(PHP 5, PHP 7)

Set property value

说明

publicReflectionProperty::setValue(object $object, mixed $value) : void

publicReflectionProperty::setValue(mixed $value) : void

Sets (changes) the property's value.

参数

$object: If the property is non-static an object must be provided to change the property on. If the property is static this parameter is left out and only$valueneeds to be provided.
$value: The new value.

返回值

没有返回值。

错误／异常

Throws aReflectionExceptionif the property is inaccessible. You can make a protected or private property accessible usingReflectionProperty::setAccessible().

范例

Example #1ReflectionProperty::setValue()example

<?php
class Foo {
    public static $staticProperty;
    
    public $property;
    protected $privateProperty;
}
$reflectionClass = new ReflectionClass('Foo');
$reflectionClass->getProperty('staticProperty')->setValue('foo');
var_dump(Foo::$staticProperty);
$foo = new Foo;
$reflectionClass->getProperty('property')->setValue($foo, 'bar');
var_dump($foo->property);
$reflectionProperty = $reflectionClass->getProperty('privateProperty');
$reflectionProperty->setAccessible(true);
$reflectionProperty->setValue($foo, 'foobar');
var_dump($reflectionProperty->getValue($foo));
?>

以上例程会输出：

string(3) "foo"
string(3) "bar"
string(6) "foobar"

参见

ReflectionProperty::getValue() Gets value
ReflectionProperty::setAccessible() Set property accessibility
ReflectionClass::setStaticPropertyValue() 设置静态属性的值

You can use ReflectionProperty::setValue to set the value on static properties as well as regular instance properties. Simply pass null in place of the instance:
<?php
class Foo {
  protected static $bar = null;
  public static function sayBar() {
    echo self::$bar;
  }
}
$r = new ReflectionProperty('Foo', 'bar');
$r->setAccessible(true);
$r->setValue(null, 'foo');
Foo::sayBar(); // "foo"
?>