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<?php $b = 'b'; $c = 'c'; $e = 'e'; $a = (object)['b' => (object)['e' => 2]]; @$d = $a->$b->$c; var_dump($d); @$d = $a->$b->$e; var_dump($d);
Output for 5.6.18, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
NULL int(2)
preferences:
95.71 ms | 1690 KiB | 4 Q