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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