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.


Predefined Constants
PHP Manual