Null Coalescing Assignment Operator
Null Coalescing Assignment Operator — Midori Kocak
https://wiki.php.net/rfc/null_coalesce_equal_operator — https://github.com/php/php-src/pull/1795
Assignment Operator:
<?php
$rad = $degrees * M_PI / 180;
$angle *= (M_PI / 180);
?>
Null Coalesce Operator:
<?php
$this->data['comments']['user_id'] = $this->data['comments']['user_id'] ?? 'value';
?>
Null Coalesce Assignment Operator:
<?php
$this->data['comments']['user_id'] ??= 'value';
?>