As of PHP 7.2.0 this extension is bundled with PHP.
For older PHP versions this extension is available via
In order to use this extension you must compile PHP
with sodium support by using the –with-sodium[=DIR] configure
In order to use this extension you have to add
extension=php_sodium.dll to php.ini.
Installation via PECL
Information for installing this PECL extension may
be found in the manual chapter titled Installation of PECL extensions. Additional
information such as new releases, downloads, source files,
maintainer information, and a CHANGELOG, can be located here: