Replaced deprecated `FILTER_SANITIZE_STRING`
Replaced deprecated `FILTER_SANITIZE_STRING`

Replaced with FILTER_SANITIZE_FULL_SPECIAL_CHARS. Equivalent to calling htmlspecialchars() with ENT_QUOTES set.

bcit-ci/CodeIgniter4,kenjis/CodeIgniter4,kenjis/CodeIgniter4,bcit-ci/CodeIgniter4,bcit-ci/CodeIgniter4,kenjis/CodeIgniter4,kenjis/CodeIgniter4,bcit-ci/CodeIgniter4,bcit-ci/CodeIgniter4,kenjis/CodeIgniter4