Installation

This » PECL extension is not bundled with
PHP.

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:
» https://pecl.php.net/package/luasandbox.

If the operating system is Debian 9 or later, or
Ubuntu 18.04 or later, then LuaSandbox should typically be
installed from the package php-luasandbox:

sudo apt-get install php-luasandbox

Debian 9 users may need to add

deb http://ftp.debian.org/debian stretch-backports main

to their » sources.list.