Installation steps and precautions for PHP Opcache in CentOS

Installation steps and precautions for PHP Opcache in CentOS

When using PHP to develop websites, in order to improve performance and speed up page loading, we usually use Opcache. Cache PHP code, reducing access to hard disk and memory, thus improving website performance. This article will introduce the detailed steps and some precautions for installing PHP Opcache under CentOS system.

1. Install PHP Opcache

1. Update the system and install the necessary software packages

First, make sure your CentOS system has been updated to the latest version and install the necessary Software packages, including PHP and related extensions:

sudo yum update
sudo yum install epel-release
sudo yum install php php-opcache

2. Configure Opcache

Next, edit the PHP configuration file php.ini, enable the Opcache extension and configure Related parameters:

sudo nano /etc/php.ini

Add the following configuration in php.ini:

[opcache]
zend_extension=opcache.so
opcache.enable=1
opcache.enable_cli=1
opcache.memory_consumption=128
opcache.interned_strings_buffer=8
opcache.max_accelerated_files=4000
opcache.validate_timestamps=0
opcache.revalidate_freq=0
opcache.fast_shutdown=1

After saving and closing the file, restart the PHP-FPM service to make the modifications effective:

sudo systemctl restart php-fpm

3. Verify the installation

In order to ensure that Opcache has been successfully installed and effective, you can create a PHP file, output the phpinfo() information, and access it in the browser. You should be able to see Opcache related information in the output information, indicating that the installation is successful.

2. Notes

1. Cache cleaning

When updating the PHP code of the website, it is best to manually clean the Opcache cache to ensure that the new code can take effect immediately. You can clean up Opcache through the following command:

sudo php -r 'opcache_reset();'

2. Monitor performance

In order to better understand the performance of Opcache, you can use some tools to monitor the usage of Opcache, such as Zend Opcache GUI, etc. , so that parameters can be adjusted in time to optimize performance.

3. Regular tuning

As website traffic and business needs change, it is recommended to regularly check the performance of Opcache and adjust the configuration parameters according to the actual situation to ensure high-performance operation of the website.

Through the above steps and precautions, you can successfully install and configure PHP Opcache on CentOS systems and improve your website performance and user experience. Hope this article helps you!

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