What is this design?

Question

PHP

I mean the design itself, the components are clear.
$this->params = $url ? array_values($url) : [];

Answer 1

This is the same as:

if($url) {
$this->params = array_values($url);
} else {
$this->params = [];
}

Shorthand for if conditions: (expression) ? true : false;
You can browse here: https://davidwalsh.name/php-ternary-examples

Answer 2

Ternary operator.

Answer 3

Alternative if else syntax
If $this->params = $url - return array_values($url), otherwise - empty array