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/memcache.
It’s possible to disable memcache session handler
support. The ‘pecl install’ option prompts for this (default is
enabled) however when compiling statically into PHP the
option may be used.