How can I improve PHP performance with OPCache?

How to Use PHP OPCache

PHP OPCache is a code caching module introduced in PHP 5.5, designed to enhance the performance of PHP applications.

Installation

OPCache is enabled by default on PHP 5.5 and later versions. However, to enable it in older versions, you need to add the following line to your php.ini file:

zend_extension=/full/path/to/opcache.so (nix)
zend_extension=C:\path\to\php_opcache.dll (win)

Usage

PHP OPCache provides several functions for managing the cache:

• opcache_get_configuration(): Returns an array containing the current OPCache configuration.
• opcache_get_status(): Returns an array with information about the current cache status, including memory usage, hits, and misses.
• opcache_reset(): Resets the entire cache, causing all cached scripts to be parsed again on the next visit.
• opcache_invalidate(): Invalidates a specific cached script, causing it to be parsed again on the next visit.

Maintenance and Reports

OpCacheGUI

A graphical user interface tool, OpCacheGUI, is available to assist with OPCache maintenance and reporting. Features include:

• OpCache status
• Configuration
• Statistics
• Cached script management

opcache-status

A command-line tool, opcache-status, provides a concise overview of OpCache status and configuration.

opcache-gui

Another graphical tool, opcache-gui, offers similar features to OpCacheGUI, including automatic cache refresh.

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