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<?php class Parent_ { public $prop; } class B extends Parent_ { } $r = new ReflectionProperty(B::class, 'prop'); $parent = new Parent_(); $r->setValue($parent, 42); var_dump($parent);
Output for 8.1.32 - 8.1.34, 8.2.0 - 8.2.32, 8.3.0 - 8.3.33, 8.4.1 - 8.4.24, 8.5.0 - 8.5.9
object(Parent_)#2 (1) { ["prop"]=> int(42) }

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