- Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
- Warning: Undefined variable $key in /in/5ubJU on line 5 Warning: Undefined array key "" in /in/5ubJU on line 5 Warning: Undefined variable $key in /in/5ubJU on line 7 NULL NULL
<?php
[$key => $value] = ['b'=> 2];
var_dump($key);
var_dump($value);