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<?php namespace App; class Foo { const BAR = 'bar'; public function baz(string $arg = Foo::BAR) { } } $r = new \ReflectionMethod(Foo::class, 'baz'); echo $r->getParameters()[0];
Output for git.master, git.master_jit, rfc.property-hooks
Parameter #0 [ <optional> string $arg = \App\Foo::BAR ]

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