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<?php trait A { protected static $_a; public static function setA($a) { static::$_a = $a; } public static function getA() { return static::$_a; } } class B { use A; public function __construct() { var_dump(static::$_a); } } A::setA('AAAA'); class C extends B {} new B(); new C();
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Calling static trait method A::setA is deprecated, it should only be called on a class using the trait in /in/h8ElJ on line 27 Deprecated: Accessing static trait property A::$_a is deprecated, it should only be accessed on a class using the trait in /in/h8ElJ on line 8 NULL NULL

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