Backport PHP 8 function signature fixes to 5.x.x branch#626

Closed

Ayesh wants to merge 1 commit intojsonrainbow:5.x.xfrom

PHPWatch:php8-optional-deprecation-5.x.x

Commits on Apr 4, 2020

Fix PHP 8 deprecation notices on required parameters appearing after optional parameters.
Ayesh
committed