(PHP 5 >= 5.1.2, PHP 7, PECL hash >= 1.1) Initialize an incremental hashing context

(PHP 4, PHP 5, PHP 7) Gets the key size of the specified cipher

(PHP 4 >= 4.0.2, PHP 5, PHP 7) Gets an array of all supported ciphers

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Decrypts data with public key

(PECL crack >= 0.1) Returns the message from the last obscure check

(PHP 4, PHP 5, PHP 7) Gets the block size of the specified hash

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Gets an exportable representation of a key into a file

(PHP 5 >= 5.5.0, PHP 7) Creates a password hash

(PHP 5 >= 5.1.2, PHP 7, PECL hash >= 1.1) Return a list of registered hashing algorithms

(PHP 4 >= 4.0.6, PHP 5, PHP 7) Encrypts data with private key