Decompile Values ​​of the form paramName: $value are named arguments (or named parameters). This functionality was introduced in PHP 8.0. Named arguments allow you to specify the values ​​of a function or method's parameters using their names, rather than just their position in the argument list.

php

array_fill(paramName: $value, value: 50, count: 100, start_index: 0, array: $value);

php

$result = array_fill(start_index: 0, count: 3, value: 'example'); print_r($result);

note:

start_index — starting index.
count — number of elements.
value — value to fill.

result

Array ( [0] => example [1] => example [2] => example )