(PHP 5, PHP 7, PHP 8)
ReflectionProperty::setValue — Définit la valeur de la propriété
Définit (modifie) la valeur de la propriété.
object
L'objet à utiliser dans le cas d'une propriété non statique.
Si la propriété est statique, nul besoin de préciser un objet, seul
value est nécessaire.
valueLa nouvelle valeur.
Aucune valeur n'est retournée.
| Version | Description |
|---|---|
| 8.1.0 | Les propriétés privées et protégées sont immédiatement accessibles par ReflectionProperty::setValue(). Auparavant, elles devaient être rendues accessibles en appelant ReflectionProperty::setAccessible(), sinon une ReflectionException était déclenchée. |
Exemple #1 Exemple avec ReflectionProperty::setValue()
<?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); // Seulement nécessaire avant PHP 8.1.0.
$reflectionProperty->setValue($foo, 'foobar');
var_dump($reflectionProperty->getValue($foo));
?>
L'exemple ci-dessus va afficher :
string(3) "foo" string(3) "bar" string(6) "foobar"
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"
?>
setValue can be used for readonly properties, but only if the property has not yet been initialised:
<?php
class Person
{
private readonly int $age;
public function __construct(array $props = []) {
if (isset($props['age'])) {
$this->age = (int)$props['age'];
}
}
}
$personWithKnownAge = new Person(['age' => 50]);
$reflection = new ReflectionProperty($personWithKnownAge, 'age');
$reflection->setValue($personWithKnownAge, 10); // Fails - Age is already initialised, value cannot be changed.
$personWithUnknownAge = new Person();
$reflection = new ReflectionProperty($personWithUnknownAge, 'age');
$reflection->setValue($personWithUnknownAge, 10); // Succeeeds - Age is not yet initialised, value can be set.
?>
This can be useful for situations where it is desirable to initialise properties from outside of the defining class, for example an ORM setup where the parent class is responsible for setting properties on a model subclass instance.
Keep in mind that setValue won't work for readonly properties.
<?php
class Person
{
public function __construct(private readonly int $age) {}
}
$someOldPerson = new Person(80);
$reflection = new ReflectionProperty($someOldPerson, 'age');
$reflection->setValue($someOldPerson, 10); // Fatal error: Uncaught Error: Cannot modify readonly property Person::$age
