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<?php //$a = array("a" => 5); //$a = $c; //echo !isset($a['d']['e']['f']); $b = array('test', "deb"); $c = array("sdf", "dsf"); var_dump($b + $c); //class A { // protected $b = 5; //} //$a = new A(); //var_dump(json_decode(json_encode($a)));
Output for 4.3.0 - 5.0.5, 5.1.1 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
array(2) { [0]=> string(4) "test" [1]=> string(3) "deb" }
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/8vQ1W on line 25
Process exited with code 255.