ReflectionProperty
PHP Manual

ReflectionProperty::setValue

Set property value

Description

public void ReflectionProperty::setValue(objectnull $object, mixed $value)
public void ReflectionProperty::setValue(mixed $value)

Sets (changes) the property's value.

Note: To set static property values, use ReflectionProperty::setValue(null, $value).

Parameters

object

For static properties, pass in null. For non-static properties, pass in the object.

value

The new value.

Return Values

No value is returned.

Changelog

Version Description
8.3.0 Calling this method with a single argument is deprecated, instead use ReflectionProperty::setValue(null, $value) for static properties.
8.1.0 Private and protected properties can be accessed by ReflectionProperty::setValue right away. Previously, they needed to be made accessible by calling ReflectionProperty::setAccessible; otherwise a ReflectionException was thrown.

Examples

Example #1 ReflectionProperty::setValue example

<?php
class Foo {
    public static $staticProperty;
    
    public $property;
    protected $privateProperty;
}

$reflectionClass = new ReflectionClass('Foo');

// As of PHP 8.3, passing in null as the first argument is required
// to access static properties.
$reflectionProperty = $reflectionClass->getProperty('staticProperty');
$reflectionProperty->setValue(null, 'foo');
var_dump(Foo::$staticProperty);

$foo = new Foo;

$reflectionClass->getProperty('property')->setValue($foo, 'bar');
var_dump($foo->property);

$reflectionProperty = $reflectionClass->getProperty('privateProperty');
$reflectionProperty->setAccessible(true); // only required prior to PHP 8.1.0
$reflectionProperty->setValue($foo, 'foobar');
var_dump($reflectionProperty->getValue($foo));
?>

The above example will output:

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

See Also

  • ReflectionProperty::getValue
  • ReflectionProperty::setAccessible
  • ReflectionClass::setStaticPropertyValue