&reftitle.setup;

&reftitle.install; As of PHP 5.1.2, the Hash extension is bundled and compiled into PHP by default. It may be explicitly disabled by using the --disable-hash switch to configure. Earlier versions of PHP may incorporate the Hash extension by installing the PECL module. As of PHP 7.4.0, the Hash extension is a core PHP extension, so it is always enabled.

&reftitle.resources; This extension defines a Hashing Context resource returned by hash_init.