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<?php $test = function() :string { return 'this is test' . PHP_EOL;}; class Def { private $str; public function __construct(string $str){ $this->str = $str; } public function __invoke() { return $this->str . PHP_EOL; } } function foo (callable $c = new Def('this is default')){ echo $c(); } foo(); foo($test);
Output for git.master, git.master_jit, rfc.property-hooks
this is default this is test

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