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Update On: 23 Jul 2021How to Install XCache for PHP

XCache is a quick, stable ​PHP opcode cacher that has been tested and is now working on increasing servers under high load. It is tested (on Linux) and maintained on all of the latest ​PHP statement categories such as PHP_5_1 PHP_5_2 PHP_5_3 PHP_5_4. ThreadSafe/Windows is also perfectly supported. It succeeds a lot of queries that have been with other competing opcachers such as being ready to be used with new ​PHP reports.
Download Latest Stable xcache Release

cd /usr/local/src/

http://xcache.lighttpd.net/pub/Releases/3.0.3/xcache-3.0.3.tar.gz

tar -zxvf xcache-3.0.3.tar.gz

cd xcache-3.0.3

Use phpize command to prepare xcache as a PHP extension for compiling, if you dont know where is phpize, use find -name phpize.

phpize

Configure, compile and install xcache

./configure –enable-xcache

make

make install

You will received the following extension directory details.

Installing shared extensions:     /usr/local/lib/php/extensions/no-debug-non-zts-20090626/

open php.ini and add xcache.so entries.

vi /usr/local/lib/php.ini

extension=”xcache.so”

restart apache webserver.

/etc/init.d/httpd restart

Thats all!! you can verify that xcache modules in your php.

root@server [/]# php -vPHP 5.3.25 (cli) (built: Jul  9 2013 23:42:49)Copyright (c) 1997-2013 The PHP GroupZend Engine v2.3.0, Copyright (c) 1998-2013 Zend Technologieswith XCache v3.0.3, Copyright (c) 2005-2013, by mOowith the ionCube PHP Loader v4.2.2, Copyright (c) 2002-2012, by ionCube Ltd., andwith XCache Cacher v3.0.3, Copyright (c) 2005-2013, by mOowith Suhosin v0.9.33, Copyright (c) 2007-2012, by SektionEins GmbH

If you still need to optimize the xcache and configure admin settings then use the following settings in your php.ini file.

[xcache.admin]xcache.admin.user   = "admin";how to create md5 pwd: echo -n "password"| md5sumxcache.admin.pass   = "5f4dcc3b5aa765d61d8327deb882cf99"[xcache]; Change xcache.size to tune the size of the opcode cache; to disable: xcache.size=0; to enable : xcache.size=64M etc (any size > 0) and your system mmap allows; someone said, if >=64 will get problemxcache.size         = 32Mxcache.shm_scheme   = "mmap"; set to cpu count (cat /proc/cpuinfo |grep -c processor)xcache.count        = 4; just a hash hints, you can always store count(items) > slotsxcache.slots        = 8K; ttl of the cache item, 0=foreverxcache.ttl          = 0; interval of gc scanning expired items, 0=no scan, other values is in secondsxcache.gc_interval  = 0; Change xcache.var_size to adjust the size of variable cache; same as aboves but for variable cache, if you have not used xcache function in script,forget itxcache.var_size     = 8Mxcache.var_count    = 1xcache.var_slots    = 8Kxcache.var_ttl      = 0xcache.var_maxttl   = 0xcache.var_gc_interval =     300xcache.test         = Offxcache.readonly_protection = On; for *nix, xcache.mmap_path is a file path, not directory.; Use something like "/tmp/xcache" if you want to turn on ReadonlyProtection; 2 group of php won’t share the same /tmp/xcache; for win32, xcache.mmap_path=anonymous map name, not file pathxcache.mmap_path    = "/tmp/xcache"; leave it blank(disabled) or "/tmp/phpcore/"; make sure it’s writable by php (without checking open_basedir)xcache.coredump_directory =   ""; per request settingsxcache.cacher       = Onxcache.stat         = Onxcache.optimizer    = Off[xcache.coverager]; per request settings; enable coverage data collecting for xcache.coveragedump_directory and; xcache_coverager_start/stop/get/clean() functions (will hurt executing performance)xcache.coverager    = On; ini only settings; make sure it’s readable (care open_basedir) by coverage viewer script; requires xcache.coverager=Onxcache.coveragedump_directory = ""