Revert "軽度のPHP警告修正"

This reverts commit 08e9d0967dfa068fab13aa446a750fe77a6b3c0c.
Revert "Revert "軽度のPHP警告修正""

This reverts commit c08e31cf1c97d32dc8d9913308fc7820ddf0a739.
Revert "Revert "Revert "軽度のPHP警告修正"""

This reverts commit 048321dec3f9e872666309b0e043261f66a0d1ce.