<?Php $column["order"] = $keys[$column["type"]] ?? 100; var_dump( $column["order"]); Output for

Question

<?Php $column["order"] = $keys[$column["type"]] ?? 100; var_dump( $column["order"]); Output for

8.0.1 - 8.0.20, 8.1.0 - 8.1.7:
Warning: Undefined variable $column in /in/P494Q on line 3

Warning: Trying to access array offset on value of type null in /in/P494Q on line 3
int(100)

Output for 7.4.0 - 7.4.30
Notice: Undefined variable: column in /in/P494Q on line 3

Notice: Trying to access array offset on value of type null in /in/P494Q on line 3
int(100)