Signature Algorithms
Version constants
Predefined Constants
PHP Manual

## Ciphers

`OPENSSL_CIPHER_RC2_40` (integer)
`OPENSSL_CIPHER_RC2_128` (integer)
`OPENSSL_CIPHER_RC2_64` (integer)
`OPENSSL_CIPHER_DES` (integer)
`OPENSSL_CIPHER_3DES` (integer)

> Note:

> These constants were added in 4.3.0.

`OPENSSL_CIPHER_AES_128_CBC` (integer)
`OPENSSL_CIPHER_AES_192_CBC` (integer)
`OPENSSL_CIPHER_AES_256_CBC` (integer)

> Note:

> These constants were added in 5.4.0.

Signature Algorithms
Version constants
Predefined Constants
PHP Manual