3v4l.org

run code in 300+ PHP versions simultaneously
<?php class C { const ENC = 1; const DEC = 2; /*const A = [ self::ENC => 'e', self::DEC => 'd' ];*/ protected $a = [ self::ENC => 'E', self::DEC => 'D' ]; public function getA() { return $this->a; } } $c = new C(); print_r($c->getA());

preferences:
34.93 ms | 402 KiB | 5 Q