The E_STRICT PHP constant is deprecated since PHP 8.4 per https://www.php.net/manual/en/migration84.deprecated.php.
Per https://wiki.php.net/rfc/deprecations_php_8_4#remove_e_strict_error_level_and_deprecate_e_strict_constant, the E_STRICT constant was still in use in-between PHP 7.0 and 7.4 for PHP's mysqli extension and PHP's htmlentities() function. Since rP23a49eb403c9ea6c58f4ae2f22416e90a9d24c14, Phorge requires 7.2.25. Phorge neither uses PHP's mysqli extension nor calls PHP's htmlentities() function.
Thus remove its usage, as E_STRICT is a part of E_ALL since PHP 5.4.0 per https://github.com/php/php-src/blob/php-5.4.0/NEWS#L69.
Closes T15989