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run code in 300+ PHP versions simultaneously
<?php trait t { private $tt = 'trait'; private function go() { return $this->tt; } } class at { use t; public function aa() { return $this->go(); } } $r = new at; var_dump($r->aa());
Output for 5.4.8 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
string(5) "trait"

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