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

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

(PHP 5 >= 5.6.0, PHP 7) Timing attack safe string comparison

(PHP 5 >= 5.1.2, PHP 7, PECL hash >= 1.1) Generate a hash value using the contents of a given file

(PHP 5 >= 5.3.0, PHP 7) Copy hashing context

(PHP 5 >= 5.1.2, PHP 7, PECL hash >= 1.1) Pump data into an active hashing context from an open stream

(PHP 5 >= 5.1.2, PHP 7, PECL hash >= 1.1) Generate a keyed hash value using the HMAC method and the contents

(PHP 5 >= 5.1.2, PHP 7, PECL hash >= 1.1) Generate a hash value (message digest)

(PHP 5 >= 5.1.2, PHP 7, PECL hash >= 1.1) Pump data into an active hashing context

(PHP 5 >= 5.1.2, PHP 7, PECL hash >= 1.1) Generate a keyed hash value using the HMAC method