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<?php trait A { private $value = 1; public function getValue() { return $this->value; } public function __set($name, $val) { var_dump($name, $val); } } class B { use A; public function setValue($value) { // Prior to v7.3, "A::__set()" would be triggered here. $this->value = $value; } } $B = new B(); var_dump($B->getValue()); $B->setValue(12); var_dump($B->getValue());

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