In the examples shown, replace "5.X" with your app's PHP version (for example, "5.6").
The XCache extension is a third-party PHP opcode cache.
PHP versions 5.5 and above include a built-in, high-performance, reliable opcode cache. The XCache extension was written before PHP had a built-in opcache. You should only use this extension if you have a specific need for it.
Installing
To install this extension, SSH in to your server as root and install the packages required to build the XCache extension.
sudo apt-get install gcc make autoconf libc-dev pkg-config
Next, download XCache, extract it, and change to the XCache directory.
wget http://xcache.lighttpd.net/pub/Releases/3.2.0/xcache-3.2.0.tar.gz tar xzf xcache-3.2.0.tar.gz cd xcache-3.2.0
Now, compile, install, and restart PHP. To install for multiple PHP versions, repeat the steps below for each PHP version.
/opt/sp/php5.X/bin/phpize PATH=/opt/sp/php5.X/bin:$PATH ./configure --enable-xcache make sudo make install sudo bash -c "echo extension=xcache.so > /etc/php5.X-sp/conf.d/xcache.ini" sudo service php5.X-fpm-sp restart
Verifying the Installation
You can verify XCache is installed correctly by running the command:
php5.X-sp -i | grep xcache
You should see the following output:
/etc/php5.X-sp/conf.d/xcache.ini, xcache.coredump_directory => no value => no value xcache.disable_on_crash => Off => Off xcache.experimental => Off => Off xcache.test => Off => Off xcache.admin.enable_auth => On => On xcache.allocator => bestfit => bestfit xcache.cacher => On => On xcache.count => 1 => 1 xcache.gc_interval => 0 => 0 xcache.mmap_path => /dev/zero => /dev/zero xcache.readonly_protection => Off => Off xcache.shm_scheme => mmap => mmap xcache.size => 0 => 0 xcache.slots => 8K => 8K xcache.stat => On => On xcache.ttl => 0 => 0 xcache.var_allocator => bestfit => bestfit xcache.var_count => 1 => 1 xcache.var_gc_interval => 120 => 120 xcache.var_maxttl => 0 => 0 xcache.var_namespace => no value => no value xcache.var_namespace_mode => 0 => 0 xcache.var_size => 0 => 0 xcache.var_slots => 8K => 8K xcache.var_ttl => 0 => 0
Installing XCache on PHP 7.0
The XCache extension does not currently work with PHP 7.0. If you attempt to install it on PHP 7.0, you will encounter errors building the extension. As soon as the extension is updated to work with PHP 7.0, you will be able to install it.
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