Alternative PHP Cache
From Phpmaniac
Contents |
What is APC
APC is the Alternative PHP Cache and what it does is cache the resulting bytecode/opcodes of a PHP script which results in decreased loading times on subsequent requests.
Why use APC
APC increases the performance of you PHP applications significantly as no parsing or compiling is required on each page load.
Installation
Installation can be done either through your operating systems package manager, or through PECL (PHP Extension Community Library).
Pecl Install
Compile and install the binary in one step using the following command.
pecl install apc
Add the following line to your php.ini
extension=apc.so
Linux
Red Hat
Install httpd-devel using Yum
yum installl httpd-devel
Use the PECL install detailed above selecting yes when asked if you want to use the Apache shared module (apxs)
Create a file called /etc/php.d/apc.ini
; Enable apc extension module extension=apc.so
Restart Apache
/etc/init.d/httpd restart
Other Linux
Use the PECL install detailed above
Windows
Download the windows binary http://pecl4win.php.net/ext.php/php_apc.dll for you version of PHP and place it in your extensions directory,
Add the following line to your php.ini
extension=php_apc.dll
FreeBSD
Using packages
Install the binary in one step using the following command.
# pkg_add -r pecl-APC
Add the following line to your php.ini (usually /usr/local/etc/php.ini)
extension=apc.so
Using Ports
Compile and install the binary in one step using the following commands.
cd /usr/ports/www/pecl-APC make install clean
Usage
Once you have installed APC generally no further configuration is required. Your scripts will now use APC by default.
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