PHP encryption and decryption algorithm function, mcrypt_encrypt is no longer recommended

Question

The official website has a warning: This function has been DEPRECATED as of PHP 7.1.0. Relying on this function is highly discouraged.

So what function is used for encryption and decryption?

Answer 1

openssl_encrypt
openssl_decrypt

>>> openssl_encrypt("1", "aes-256-cbc", "12312321", 0, "1234123443212345");
=> "x6Zfu2cbtbMDfkt2s/GE2A=="
>>> openssl_decrypt("x6Zfu2cbtbMDfkt2s/GE2A==", "aes-256-cbc", "12312321", 0, "1234123443212345");
=> "1"

Also see How do you Encrypt and Decrypt a PHP String?

Answer 2

password_hash
password_verify

Answer 3

What about hash encryption?

Answer 4

Asymmetric encryption, RSA.