ReflectionProperty::setValue

(PHP 5)

ReflectionProperty::setValueSet property value

Description

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

Sets (changes) the property's value.

Parameters

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 value needs to be provided.

value

The new value.

Return Values

No value is returned.

Errors/Exceptions

Throws a ReflectionException if the property is inaccessible. You can make a protected or private property accessible using ReflectionProperty::setAccessible().

Examples

Example #1 ReflectionProperty::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));
?>

The above example will output:

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

See Also

Коментарии

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"
?>
2011-06-22 12:27:47
http://php5.kiev.ua/manual/ru/reflectionproperty.setvalue.html
Автор:
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');
$reflection->setValue($someOldPerson10); // Fatal error: Uncaught Error: Cannot modify readonly property Person::$age
2022-10-10 20:41:01
http://php5.kiev.ua/manual/ru/reflectionproperty.setvalue.html
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');
$reflection->setValue($personWithKnownAge10); // Fails - Age is already initialised, value cannot be changed.

$personWithUnknownAge = new Person();

$reflection = new ReflectionProperty($personWithUnknownAge'age');
$reflection->setValue($personWithUnknownAge10); // 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.
2022-12-16 17:18:43
http://php5.kiev.ua/manual/ru/reflectionproperty.setvalue.html

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