Turns out the default setting for error_reporting used by the SetupPHP action is error_reporting=E_ALL & ~E_DEPRECATED & ~E_STRICT and display_errors is set to Off.
For the purposes of CI, I'd recommend running with E_ALL and display_errors=On to ensure all PHP notices are shown.
Turns out the default setting for
error_reportingused by the SetupPHP action iserror_reporting=E_ALL & ~E_DEPRECATED & ~E_STRICTanddisplay_errorsis set toOff.For the purposes of CI, I'd recommend running with
E_ALLanddisplay_errors=Onto ensure all PHP notices are shown.