PHP 8 deprecates openssl_free_key (actually openssl_pkey_free which it aliases) and automatically destroys the key instance when it goes out of scope.
(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)
openssl_pkey_free — 秘密鍵を開放する
key
キーを保持するリソース。
値を返しません。
PHP 8 deprecates openssl_free_key (actually openssl_pkey_free which it aliases) and automatically destroys the key instance when it goes out of scope.