Warnings related to `func_get_args()` using PHP Compatibility Checker

[gizmecano]

Description of issue

I have absolutely no idea if this is a real issue, but just for informing purpose, I point out that PHP Compatibility Checker reports two warnings.

Steps to recreate issue

1. Check PHP version compatibility (7.3) using PHP Compatibility Checker

Current behavior

Compatible with 2 warnings and 0 error

Expected behavior

Compatible with 0 warning and 0 error

Additional Useful Information

The two reported warnings are:

wp-content/plugins/backupwordpress/backdrop/task.php
FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
12 | WARNING | Since PHP 7.0, functions inspecting arguments, like func_get_args(), no longer report the original value as passed to a parameter, but will instead provide the current value. The parameter $callback was used, and possibly changed (by reference), on line 9.

---

wp-content/plugins/backupwordpress/classes/backup/class-backup-engine.php
FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
192 | WARNING | Since PHP 7.0, functions inspecting arguments, like func_get_args(), no longer report the original value as passed to a parameter, but will instead provide the current value. The parameter $type was used, and possibly changed (by reference), on line 178.