ref #497 PHP8の修正

[nobuhiko]

PHP8では Use of undefined constant が fatal errorになるため、PHP8系では data/config/config.php が存在しないと fatal error になってしまい、かつログファイルのパスも存在しないためにエラー画面も表示されない

[codecov-commenter]

Codecov Report

Merging #499 (3956305) into master (261ef5d) will decrease coverage by 0.09%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master     #499      +/-   ##
============================================
- Coverage     46.62%   46.52%   -0.10%     
  Complexity       14       14              
============================================
  Files            81       81              
  Lines         10580    10602      +22     
============================================
  Hits           4933     4933              
- Misses         5647     5669      +22     

Flag	Coverage Δ
tests	46.52% <0.00%> (-0.10%)	⬇️

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Impacted Files	Coverage Δ
data/class/SC_Initial.php	0.00% <0.00%> (ø)

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[nanasess]

PHPStan が落ちているのは #500 で修正しました

[chihiro-adachi]

@nobuhiko @nanasess
ありがとうございます、マージしました。