Let’s see how to clear PHP OPcache without restarting PHP-FPM in this article. At Bobcares, with our Server Management Services, we can handle your server issues.

How to clear PHP OPcache without restarting PHP-FPM?

We can now easily clear the PHP Opcache without restarting PHP-FPM with the help of CacheTool. In this article, we will provide the instructions to install the CacheTool alongside a demonstration PHP-FPM Docker container.

Installing CacheTool

• Firstly, we need to create and Run a PHP-FPM App.
• Then install the CacheTool.
•  Basic Operation resets the contents of the opcode cache.
• Lastly, confirm OPcache is empty.

Create And Run A PHP-FPM App

On the CLI, run the following command:

$ docker run \
  --detach \
  --name php56 \
  --publish 8888:80 \
  jdeathe/centos-ssh-apache-php:2.1.1

Now to verify that it functions.

$ curl -I http://localhost:8888/

In order to create some cache usage, make another request. We can also try a different URL.

$ curl -I http://localhost:8888/_phpinfo.php

Install The CacheTool

The open_basedir directive in the demonstration app restricts PHP files to the /var/www/app directory, thus the CacheTool should be installed to /var/www/app/bin with the proper permissions.

$ docker exec -i php56 curl -s \
  -o /var/www/app/bin/cachetool.phar \
  http://gordalina.github.io/cachetool/downloads/cachetool.phar
$ docker exec -i php56 chmod 750 /var/www/app/bin/cachetool.phar
$ docker exec -i php56 chown app:app /var/www/app/bin/cachetool.phar

Basic Operation

With the following code, we can clear the contents of the opcode cache without restarting PHP-FPM.

$ docker exec -i php56 \
  php /var/www/app/bin/cachetool.phar \
  --tmp-dir=/var/www/app/var/tmp \
  --fcgi=/var/run/php-fpm/app-www.sock \
  opcache:reset

Verify OPcache Is Empty

We have to include the command in the composer post install/update scripts to ensure that the OPcache is cleared after each deployment without restarting PHP-FPM. In this manner, OPcache will also update its cache each time we install the dependencies:

"post-install-cmd": [
        // ...
        "cachetool opcache:reset --fcgi=/var/run/php5-fpm.sock"
    ]

Identify Usage

In order to explore the CacheTool usage, use the following code:

$ docker exec -i php56 \
  php /var/www/app/bin/cachetool.phar help

Other OPcache Commands

1. opcache:configuration: Access the cache’s configuration data.

2. opcache:invalidate:scripts: Clear the scripts in the opcode cache.

3. opcache:reset: Resets the opcode cache’s contents.

4. opcache:status: Display a summary of the opcode cache’s information.

5. opcache:status:scripts: Display opcode cache’s scripts.

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Conclusion

In this article, we have included the steps from our Support team to install PHP CacheTool, along with the code to find its usage and also available commands with the Opcache.