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    ReflectionProperty::setValue

    (PHP 5, PHP 7, PHP 8)

    ReflectionProperty::setValue — Establece el valor de la propiedad

    Descripción

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

    Establece (cambia) el valor de la propiedad.

    Parámetros

    object

    Si la propiedad no fuera estática, se deberá proporcionar un objeto sobre el que se cambiará la propiedad. Si la propiedad fuera estática, se omite este parámetro y sólo será necesario completar el value.

    value

    El nuevo valor.

    Valores devueltos

    No devuelve ningún valor.

    Errores/Excepciones

    Lanza ReflectionException si la propiedad no fuera accesible. Si la propiedad fuera de tipo protegido o privado, podrá hacerse accesible mediante ReflectionProperty::setAccessible().

    Ejemplos

    Ejemplo #1 Ejemplo de 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);
    $reflectionProperty->setValue($foo, 'foobar');
    var_dump($reflectionProperty->getValue($foo));
    ?>

    El resultado del ejemplo sería:

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

    Ver también

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    User Contributed Notes 3 notes

    up
    2
    me at ircmaxell dot om
    13 years ago
    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"
    ?>
    up
    2
    p stewart imperial ac uk
    2 years ago
    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.
    up
    -1
    temirkhan.nasukhov
    2 years ago
    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
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