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<?php trait callback{ public function __invoke($p){} } class foo { use callback; } $inline = new class { use callback; }; var_dump( is_callable($inline, false, $target), $target, is_callable([$inline, '__invoke'], false, $target), $target, is_callable(new foo, false, $target), $target );
Output for git.master, git.master_jit, rfc.property-hooks
bool(true) string(39) "class@anonymous/in/kTN4e:7$1::__invoke" bool(true) string(39) "class@anonymous/in/kTN4e:7$1::__invoke" bool(true) string(13) "foo::__invoke"

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