How to Install Opcache to Improve PHP Performance on Linux
May 11, 2025 am 09:14 AM
This guide details how to install and configure Opcache to boost PHP performance on a Linux server. Opcache, a built-in PHP opcode caching mechanism, stores compiled bytecode in shared memory, significantly speeding up script execution.
Understanding Opcache
Opcache accelerates PHP by caching compiled scripts. When a request arrives, Opcache checks its memory for a compiled version. If found, it skips the time-consuming parsing and compilation steps, leading to faster response times and reduced server load.
Installation on Linux
Begin by updating your system's package repository:
sudo apt update # Debian/Ubuntu sudo dnf update # RHEL/CentOS
Then, install Opcache:
sudo apt install php-opcache # Debian/Ubuntu sudo yum install php-opcache # RHEL/CentOS
Verify the installation:
php -m | grep opcache # or php -i | grep opcache
Successful installation displays "opcache".
Configuration
Locate your php.ini file:
php --ini
Edit the file (e.g., using sudo nano /etc/php/7.4/apache2/php.ini - adjust the path according to your PHP version and web server):
; Enable Opcache opcache.enable=1 ; Memory allocation (adjust as needed) opcache.memory_consumption=128 ; Maximum cached scripts opcache.max_accelerated_files=10000 ; Revalidation frequency (seconds) opcache.revalidate_freq=2 ; Enable timestamp validation opcache.validate_timestamps=1 ; Maximum file size (MB) opcache.max_file_size=2M ; Enable Opcache for CLI opcache.enable_cli=1
Save the changes and restart your web server (e.g., sudo systemctl restart apache2 or sudo systemctl restart nginx).
Testing and Monitoring
Create a info.php file (e.g., in /var/www/html/) containing <?php phpinfo(); ?>. Access it via your browser (e.g., http://your_server_ip/info.php). The "Opcode Caching" section confirms Opcache's functionality.
For detailed monitoring, consider using a tool like opcache-gui:
git clone https://github.com/amnuts/opcache-gui.git sudo mv opcache-gui /var/www/html/
Access it through your browser (e.g., http://your-server-ip/opcache-gui).
Alternatively, use the command line:
php -i | grep opcache
Conclusion
By implementing Opcache, you can significantly enhance PHP application performance, resulting in faster loading times and a better user experience. Remember to adjust the memory allocation and other settings based on your server's resources and application needs.
The above is the detailed content of How to Install Opcache to Improve PHP Performance on Linux. For more information, please follow other related articles on the PHP Chinese website!
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