eAccelerator is a free and open source accelerator for PHP. It increases the performance of PHP scripts by caching them in compiled state, so the overhead of compiling is almost completely eliminated.
eAccelerator typically reduces server load and increases the speed of your PHP code by 1-10 times.
eAccelerator is a fork of TurckMMCache ( http://sourceforge.net/projects/turck-mmcache/ by Dmitry Stogov )
eAccelerator stores compiled PHP scripts in shared memory and executes code directly from it. It creates locks only for short time, while searching compiled PHP script in the cache, so one script can be executed simultaneously by several engines. Files that can't fit in shared memory are cached on disk only.
eAccelerator is compatible with Zend Optimizer's loader. Zend Optimizer must be installed after eAccelerator in php.ini. If you don't use scripts encoded with Zend Encoder we do not recommend to install Zend Optimizer with eAccelerator.
eAccelerator does not work in CGI mode but it does work in FastCGI mode with webservers like lighttpd or using php-fpm.
Latest eAccelerator versions can be downloaded at the sourceforge page: http://sourceforge.net/projects/eaccelerator/ Development snapshots from cvs can be downloaded at http://snapshots.eaccelerator.net
- apache >= 1.3, mod_php >= 5.1 or php with fastcgi support
- autoconf, automake, libtool, m4
eAccelerator works with php version 5.1 and higher. It is being used on Linux, FreeBSD, Mac OS X, Solaris and Windows with Apache 1.3 and 2, lighttpd, php-fpm and IIS.
You can find more information about the installation of eAccelerator on our website at http://www.eaccelerator.net/
Note(1): for Microsoft Windows installation, please refer to README.win32 file.
Step 1. Compiling eAccelerator
export PHP_PREFIX="/usr"
$PHP_PREFIX/bin/phpize
./configure \
--enable-eaccelerator=shared \
--with-php-config=$PHP_PREFIX/bin/php-config
make
You must specify the real prefix where PHP is installed in the "export" command. It may be "/usr" "/usr/local", or something else.
Step 2. Installing eAccelerator
make install
Step 3. Configuring eAccelerator
eAccelerator can be installed both as Zend or PHP extension.
For eaccelerator > 0.9.1, if you have /etc/php.d directory, you should copy eaccelerator.ini inside and modify default value if you need.
If not, you need to edit your php.ini file (usually /etc/php.ini).
To install as Zend extension:
zend_extension="/usr/lib/php5/eaccelerator.so"
eaccelerator.shm_size="16"
eaccelerator.cache_dir="/tmp/eaccelerator"
eaccelerator.enable="1"
eaccelerator.check_mtime="1"
eaccelerator.debug="0"
eaccelerator.filter=""
eaccelerator.shm_ttl="0"
eaccelerator.shm_prune_period="0"
eaccelerator.shm_only="0"
If you use thread safe build of PHP you must use "zend_extension_ts" instead of "zend_extension".
To install as PHP extension:
extension="eaccelerator.so"
eaccelerator.shm_size="16"
eaccelerator.cache_dir="/tmp/eaccelerator"
eaccelerator.enable="1"
eaccelerator.check_mtime="1"
eaccelerator.debug="0"
eaccelerator.filter=""
eaccelerator.shm_ttl="0"
eaccelerator.shm_prune_period="0"
eaccelerator.shm_only="0"
Step 4. Creating cache directory
mkdir /tmp/eaccelerator
chmod 0777 /tmp/eaccelerator
eaccelerator.shm_size The amount of shared memory (in megabytes) that eAccelerator will use. "0" means OS default. Default value is "0".
eaccelerator.cache_dir The directory that is used for disk cache. eAccelerator stores precompiled code, session data, content and user entries here. The same data can be stored in shared memory also (for more quick access). Default value is "/tmp/eaccelerator".
eaccelerator.enable Enables or disables eAccelerator. Should be "1" for enabling or "0" for disabling. Default value is "1".
eaccelerator.debug Enables or disables debug logging. Should be "1" for enabling or "0" for disabling. Default value is "0".
eaccelerator.check_mtime Enables or disables PHP file modification checking . Should be "1" for enabling or "0" for disabling. You should set it to "1" if you want to recompile PHP files after modification. Default value is "1".
eaccelerator.filter Determine which PHP files must be cached. You may specify the number of patterns (for example "*.php *.phtml") which specifies to cache or not to cache. If pattern starts with the character "!", it means to ignore files which are matched by the following pattern. Default value is "" that means all PHP scripts will be cached.
eaccelerator.shm_ttl When eaccelerator fails to get shared memory for new script it removes all scripts which were not accessed at last "shm_ttl" seconds from shared memory. Default value is "0" that means - don't remove any files from shared memory.
eaccelerator.shm_prune_period When eaccelerator fails to get shared memory for new script it tryes to remove old script if the previous try was made more then "shm_prune_period" seconds ago. Default value is "0" that means - don't try to remove any files from shared memory.
eaccelerator.shm_only Enables or disables caching of compiled scripts on disk. It has no effect on session data and content caching. Default value is "0" that means - use disk and shared memory for caching.
eaccelerator.allowed_admin_path The script paths that are allowed to get admin information and do admin controls
If you want to use the control-panel you need to compile eAccelerator with --with-eaccelerator-info which is the default value. You need to copy the control.php file to your webroot and set the path to it in the php.ini or eaccelerator.ini in the eaccelerator.allowed_admin_path directive. If you don't do this you wont be able to see much information and can't control eAccelerator. You can set the username and password needed to access the control-panel in the control.php file. By default the username is administrator and the password is eAccelerator.
When you compile eAccelerator with --with-eaccelerator-disassembler you need to place the dasm.php and PHP_Highlight.php file also in the same directory as the control.php file. The disassembler requires PHP to be compiled with tokenizer support (--enable-tokenizer). You can set the username and password needed to access the disassembler at the top of dasm.php.
You can contact us with questions, patches or bugs on GitHub https://github.com/eaccelerator/eaccelerator
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